My kids are watching TV when I get home. 我回家时，孩子们正在看电视。(1) 主语改为 She 开头的过去时—> She was watching TV when I got home. 我回家时，她正在看电视。(2) 改为将来进行时的句子—> My kids will be watching TV when I get home. 我回家时，孩子们会是在看电视。(3) 改为用 What 开头的过去进行时疑问句—> What were my kids doing when I got home? 我回家时，孩子们在做什么？ I turn off the light. 我关灯。/ 我熄灯。(1) 改为过去时否定句—> I didn't turn off the light. 我没熄灯。(2) 改为以 you 为主语的过去时疑问句—> Did you turn off the light? 你熄灯了吗？(3) 改为以 I wonder if 开头的句子—> I wonder if I turn off the light. 我有没有关灯？
My son goes to cram school every evening. 我儿子每天晚上都去上补习班。(1) 主语改为复数—> My sons go to cram school every evening. 我的儿子们每天晚上都去上补习班。(2) 改为 You 为主语的附加疑问句—> You go to cram school every evening, don't you? 你是每天晚上去补习班吗？/ 你每天晚上去补习班，是吗？ (3) 主语改为 you 并改为表示“一星期多少次……”为开头的疑问句 （问“多少次”的疑问句可以 How often...? How many times...? 的句型）—> How often do you go to cram school a week? How many times do you go to cram school a week? 你一个星期去多少次补习班？The children are playing cards in the living room. 孩子们在客厅玩扑克牌。(1) 改为过去时的疑问句—> Were the children playing cards in the living room? （过去的某个时间段）孩子们在客厅玩扑克牌吗？(2) 句子开头加 I think “我想……，我认为……”—> I think the children are playing cards in the living room. 我想孩子们正在客厅玩扑克牌。(3) 改为用 may 表示的“也许……，可能……”的句子—> The children may be playing cards in the living room. 孩子们也许正在客厅玩扑克牌。
My wife opens the door for me. 我太太为我开门。(1) 主语改为 You—> You open the door for me.你为我开门。(2) 改为进行时—> My wife is opening the door for me. 我太太正在为我开门。(3) 改为 Could you...?“你能……”的疑问句—> Could you open the door for me? 你能为我开门吗？Dad is sleeping on the couch. 爸爸正在长椅上睡觉。(1) 主语改为 You—> You are sleeping on the couch. 你正在长椅上睡觉。(2) 改为 Don't...开头的否定句来表示“不可以”“别……”—> Don't sleep on the couch. 别在长椅上睡觉。(3) 改为用 must 来表示“应该睡在长椅上呢吧”表示推测之意的句子—> Dad must be sleeping on the couch. 爸爸应该是正在长椅上睡觉。
I do aerobics. 我做有氧运动。(1) 改为以 You 为主语的现在完成时疑问句—> Have you ever done aerobics? 你做有氧运动了？(2) 改为“我从没……” never—> I've never done aerobics. 我从没做过有氧运动。(3) 改为以 She 为主语的过去进行时—> She was doing aerobics. （过去的某个时间段）她正在做有氧运动。Someone is walking behind me. 有人走在我后面。(1) 改为以 No one 为主语的句子—> No one is walking behind me. 没人走在我后面。(2) 改为以 Who 开头的疑问句—> Who is walking behind me? 谁走在我后面？(3) 改为以 Do you think 开头的疑问句—> Do you think someone is walking behind me? 你觉得有人走在我后面吗？
I applaud the performance. 我为演出鼓掌喝彩。(1) 改为以 She 为主语的现在进行时—> She is applauding the performance. 她为演出鼓掌喝彩。(2) 改为以 they 为主语的过去时疑问句—> Did they applaud the performance? 他们为演出鼓掌喝彩了吗？(3) 改为以 You 为主语，并且以 Why 开头的过去时疑问句—> Why did you applaud the performance? 你为什么为演出鼓掌喝彩？I eat noodles at the noodle restaurant. 我在面馆吃面。(1) 改为以 We 为主语的将来时—> We will eat noodles at the noodle restaurant. 我们要在面馆吃面。(2) 改为以 Let's 为主语—> Let's eat noodles at the noodle restaurant. 我们在面馆吃面吧。(3) 改为以 You 为主语的过去时疑问句—> Did you eat noodles at the restaurant? 你在饭馆吃面了吗？—> Did you eat noodles at the noodle restaurant? 你在面馆吃面了吗？
I take a shot of whiskey. 我喝一杯威士忌。(1) 改为现在进行时—> I'm taking a shot of whiskey. 我正在喝杯威士忌。(2) 改为以 She 为主语的疑问句—> Does she take a shot of whiskey? 她要喝一杯威士忌吗？(3) 改为“喝了三杯”—> I took three shots of whiskey. 我喝了三杯威士忌。She stops at the supermarket on the way home. 她在回家途中顺道上超市。(1) 改为过去时否定句—> She didn't stop at the supermarket on the way home. 她在回家途中没有顺道去超市。(2) 将动词改为 have to...“应该……”—> She has to stop at the supermarket on the way home. 她回家的途中应该去趟超市。(3) 改为以 Where 开头，并且用 be going to 的将来时疑问句—> Where is she going to stop on the way home? 她回家途中顺道要去哪儿？
This knife cuts very well. 这把刀很锋利。(1) 改为否定句—> This knife doesn't cut very well. 这把刀不太锋利。(2) 改为“这把刀根本没办法切东西”—> This knife doesn't cut at all.（句型 not...at all 表示“根本不……”）(3) 改为 Do you think...? “不认为”开头的疑问句—> Do you think this knife cuts very well? 你觉得这把刀锋利吗？ABC department store is having a sale this week. ABC百货公司这星期正在大减价。(1) this week 改为 last week—> ABC department store had a sale last week. ABC百货公司上星期大减价了。(2) 改为疑问句—> Is ABC department store having a sale this week? ABC百货公司这星期正在大减价吗？(3) 改为以 when 为开头的将来时疑问句—> When will ABC department store have a sale? ABC百货公司什么时候大减价？
The bank closes at 3:00 p.m. 银行在3点关门。(1) 改成以“什么时候” When 开头的疑问句—> When does the bank close? 银行什么时候关门？(2) 改成附加疑问句—> The bank closes at 3:00 p.m., doesn't it? 银行在3点关门是吗？ (3) 改为用 cannot “不可能……”和 2:00 p.m.“2点钟”表示“银行不可能在2点关门。”—> The bank cannot close at 2:00 p.m.I stand in line at the cash register. 我在收银台排队。(1) 改为过去时—> I stood in line at the cash register. 我在收银台排队了。（stand“站”的过去时是 stood）(2) 改为以 she 为主语的过去时疑问句—> Did she stand in line at the cash register? 她在收银台排队了吗？(3) 改为现在完成进行时 have been doing，并加上 for twenty minutes 表示“我在收银台前排了20分钟队。”—> I have been standing in line at the cash register for twenty minutes.
I throw away the garbage. 我丢垃圾。(1) 改成以 He 为主语的过去时—> He threw away the garbage. 他丢垃圾。（throw 的过去式是 threw）(2) 加上 yesterday 并改为否定句—> I didn't throw away the garbage yesterday. 昨天我没有丢垃圾。(3) 以 he 为主语，并在句子前面加上 I saw—> I saw him throw away the garbage. 我看见他丢垃圾I change the baby's diaper. 换婴儿尿布。(1) 改为以 she 为主语的过去时疑问句—> Did she change the baby's diaper? 她给婴儿换尿布了吗？(2) 主语改为 she，并以“多少次”为开头的疑问句—> How many times a day does she change the baby's diaper? 她一天换多少次婴儿尿布？(3) 改为以 she 为主语，并且加上“2小时以前”—> She changed the baby's diaper two hours ago. 她2小时以前给婴儿换过尿布。
The meeting went well. 会议进行得很顺利。(1) 句子开头加上 I hope...“我希望……”，提示: 时态用将来时—> I hope the meeting will go well. 我希望会议进行顺利。(2) 句子开头加上 He said...“他说……”—> He said the meeting went well. 他说会议进行得很顺利。(3) 句子开头加上 I wish...“希望……”，提示: 时态用过去完成时（表示与过去事实相反的愿望）—> I wish the meeting had gone well. 希望/愿会议进行得顺利。Somebody tripped over the cord. 有人被电线绊倒了。(1) 改为以 Who 开头的疑问句—> Who tripped over the cord? 谁被电线绊倒了？(2) 用 must “一定是……”造句—> Somebody must have tripped over the cord. 一定是有人被电线绊倒了。 （“一定是……”用 must + have + 过去分词来表达）(3) 改为以 She 为主句的过去时附加疑问句—> She tripped over the cord, didn't she? 她被电线绊倒了是吗？
A salesman explains a new product. 销售员说明新产品。(1) 改为以 I 为主语的现在进行时的句子—> I'm explaining a new product. 我正在说明新产品。(2) 改为以 He 为主语的过去时的疑问句—> Did he explain the new product? 他说明新产品了吗？(3) 改为以 Who 开头的过去时疑问句—> Who explained the new product? 谁说明了新产品？Everyone comes back from lunch. 大家吃完午餐回来。(1) 改为过去时的疑问句—> Did everyone come back from lunch? 大家吃完午饭回来了吗？(2) 改为“还没有人回来。”的现在完成时的句子—> No one has come back from lunch yet.(3) 改为以 When “什么时候”开头的将来时疑问句—> When will everyone come back from lunch? 大家什么时候吃完饭回来？
The office clock is ten minutes fast. 办公室的时钟快十分钟。(1) 改为疑问句—> Is the office clock ten minutes fast?(2) 改为附加疑问句—> The office clock is ten minutes fast, isn't it?(3) 把 The office 改为 Your watch “你的手表”，并改为“慢十分钟”—> Your watch is ten minutes slow. 你的表慢了十分钟。The client placed a large order. 客户订了大量的货。(1) 改为疑问句，时态还是过去时—> Did the client place a large order? 客户订了大量的货吗？(2) 句子开头加入 I wish “我希望……” 提示: 时态要用过去完成时，表示与过去事实相反的愿望—> I wish the client had placed a large order. 我希望客户订了大量的货。(3) 改为以 When “什么时候”为开头的过去时疑问句—> When did the client place a large order? 客户什么时候订了大量的货呢？
It seems like it's going to get hot today. 今天看起来会很热。(1) hot 换为 cold—> It seems like it's going to get cold today.今天看起来会很冷。(2) 改为疑问句—> Does it seem like it's going to get hot today? 今天看起来会很热吗？(3) 把 get hot 改为 rain，再把 today 换成 soon—> It seems like it's going to rain soon. 看起来很快会下雨。I go up by the elevator. 我搭电梯上去。(1) 主语改为 he—> He goes up by the elevator. 他搭电梯上去。(2) 改为否定句—> I don't go up by the elevator. 我不搭电梯上去。(3) 把第一句 he 为主语的句子前面加 I saw—> I saw him go up by the elevator. 我看见他搭电梯上去。
This ticket machine is broken. 这台售票机坏了。(1) 改为疑问句 —> Is this ticket machine broken?(2) 句子开头加 I wonder if 我想知道是不是……/ 我怀疑是否……—> I wonder if this ticket machine is broken.(3) 改为以 someone “有人/某个人”为主语的主动式句子，时态为过去时—> Someone broke this ticket machine. 有人把这台售票机弄坏了。There are no seats on the bus. 公共汽车上没有空位。(1) 将 no 改为 some 的肯定句—> There are some seats on the bus.(2) 改为疑问句—> Are there no seats on the bus? 公共汽车上没有空位吗？/ Are there any seats on the bus? 公共汽车上有空位吗？(3) 改为用 must “应该……”做助动词的句子—> There must be no seats on the bus.
I'd better run so I can make the light. 我最好在信号灯变换之前跑过去。(1) 主语改为 We—> We'd better run so we can meke the light.(2) 用 have to...“应该……”（提示: 用 have to 替换 'd better “最好……”）—> I have to run so I can make the light.(3) make the light 改为 catch the light—> I'd better run so I can catch the light.My train pass has expired. 我的月票过期了。(1) 改为附加疑问句—> My train pass has expired, hasn't it?(2) 改为 when 开头的疑问句—> When did my train pass expire? 我的月票什么时候过期了？(3) 改为否定句—> My train pass hasn't expired yet. 我的月票还没有过期。
I shouldn't have stayed up late. 我不该那么晚才睡。(1) 句首加 I wish—> I wish I hadn't stayed up late.I wish “我希望……”后面要变成和事实相反的过去完成时。(2) 改为表示事实的肯定句—> I stayed up late.(3) 改为含有 be going to 和 tonight 的将来时肯定句—> I'm going to stay up late tonight.I jog. 我慢跑。(1) 主语改为 he—> He jogs.(2) 主语改为 you，再改为现在完成时的疑问句—> Have you (ever) jogged?改为 you 为主语就是 You jogged，变成现在完成时就是 You have jogged，再变成疑问句就是 Have you jogged? 可以加个 ever 就是 Have you ever jogged?(3) 主语改为 she，改为现在进行时疑问句—> Is she jogging?she 为主语就是 She jogs. 现在进行时就是 She is joking，再变成疑问句就是 Is she jogging?
I have trouble waking up in the morning. 早上起来对我而言是件苦事。/ 早上起床很困难。(1) 改为否定句—> I don't have trouble waking up in the morning.因为这里的 have 是实义动词，所以用 don't 表示否定。(2) 主语改为 you，并改为以 why 开头的疑问句 —> Why do you have trouble waking up in the morning?先改成 you 为主语，就是 You have trouble waking up in the morniing，然后变成 why 疑问句 Why do you have trouble waking up in the morning? 因为是特殊疑问句，所以句尾读降调。(3) 主语改为 Jim（吉姆），再改为疑问句—> Does Jim have trouble waking up in the morning?先用 Jim 做主语，要用第三人称单数，就是 Jim has trouble waking up in the morning，然后变成疑问句 Does Jim have trouble waking up in the morning?
I love the smell of coffee. 我喜欢咖啡的香味。(1) 主语改为 she—> She loves the smell of coffee.(2) 主语改为 he，再改为疑问句 —> Does he love the smell of coffee?(3) 主语改为 you，并改为附加疑问句—> You love the smell of coffee, don't you?My face looks awful. 我的脸好难看。(1) 改为疑问句—> Does my face look awful?(2) 主语改为 their faces—> Their faces look awful.(3) 改为附加疑问句—> My face looks awful, doesn't it?
It's cold this morning. 今天早上好冷。(1) 改为过去式—> It was (It's) cold this morning.(2) 改为附加疑问句/反义疑问句—> It's cold this morning, isn't it?附加疑问句/反义疑问句的句型是:如果是肯定句: 主句肯定陈述句+否定附加疑问句如果是否定句: 主句否定陈述句+肯定附加疑问句比如，..., aren't you? / ..., didn't they? / ..., is he?附加疑问句常用于征求对方的同意或者确认什么事情。(3) this moring 换成 last night，并且改为疑问句—> Was it could last night?先把 this moring 换成 last night 就是 It's cold last night. 再换成疑问句就是 Was it could last night?
第6个中心句Supper's ready. 晚餐准备好了。请说出下面三种动作:大家就坐。--> Everybody sits down / Everybody takes a seat. （这里是把 everybody “所有人”当成一个整体（单数），所以后面用 sits 和 takes）孩子们谈谈有关学校的事。--> The children talk about school.狗在桌下摇尾巴。--> The dog is wagging his tail under the table.（wagging his tail 是“摇（他的）尾巴”，也可以是 wagging her tail，也可以用动物“它” wagging its tail，不用分性别）请说出以下三种心理活动:我最后一次和家人一起吃晚饭是什么时候呢？--> When was the last time I had dinner with my family?小心！你会把汤洒在地上。--> Be careful! You're going to spill the soup.（提醒别人注意时还经常会用“Watch out (it)!”这个词组。spill 是“溅在……，洒在……”）不要担心，我会给你一片肉。--> Don't worry. I'll give you a piece of meat.（“一片肉”是 a piece of meat，如果是“一块肉”是 a chunk of meat）