1.There (D) a dirty river here,but now it has become quite clean.A.would be B.ought to be C.has been D.used to be【为什么不选A?】2.What he said has us (A) all night.A.laughing B.to laugh C.laugh D.laughed【为什么不选C?】关于第一题

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1.There (D) a dirty river here,but now it has become quite clean.A.would be B.ought to be C.has been D.used to be【为什么不选A?】2.What he said has us (A) all night.A.laughing B.to laugh C.laugh D.laughed【为什么不选C?】关于第一题

1.There (D) a dirty river here,but now it has become quite clean.A.would be B.ought to be C.has been D.used to be【为什么不选A?】2.What he said has us (A) all night.A.laughing B.to laugh C.laugh D.laughed【为什么不选C?】关于第一题
1.There (D) a dirty river here,but now it has become quite clean.
A.would be B.ought to be C.has been D.used to be
【为什么不选A?】
2.What he said has us (A) all night.
A.laughing B.to laugh C.laugh D.laughed
【为什么不选C?】
关于第一题,我们语法解释那里有说【would 还可表示过去的习惯性动作,意为“常常,总是”,相当于used to】

1.There (D) a dirty river here,but now it has become quite clean.A.would be B.ought to be C.has been D.used to be【为什么不选A?】2.What he said has us (A) all night.A.laughing B.to laugh C.laugh D.laughed【为什么不选C?】关于第一题
1 从句意上说,become说明a dirty river 是以前的实际情况,所以用过去时
你说的A,过去将来时,表示你过去期望它现在脏,就不存在后面的become了
所以不符合提议
针对你的补充
Used to可指过去的状态或情况,would则不能,would强调反复发生的动作
2 这里的have是使役动词,have sb do/doing都可以
后面的all night说明laugh是持续的 所以用laughing

1 A would是will 的过去式 意思是 将会 不符题意
2 固定搭配 have sb done 让某人做某事;have sb doing 让某人一直做某事

因为1条是过去时,所以要用动词的过去式,2条就看看你的掌握咯!加油哦!~~~~~~~~

There ,on the ground ,____ an old man in dirty clothes .a.lying b.lied c.lay d.laid 35.There were dirty marks on her trousers ______ she had wiped her hands.(There were dirty marks on her trousers ______ she had wiped her hands.(2004全国II) A.where B.which C.when D.that —What are you doing there?—I am doing the _____.How dirty these clothes─What are you doing there?─I am doing the _____.How dirty these clothes are![ ]A.dishesB.reading C.laundry D.sports There --- a dirty lake, now here is a beautiful garden. A used to B used to be C used to have D is is there a dirty fork on the plate?这句的主语是a dirty fork还是the plate There were dirty marks on her trousers ______ she had wped her hands. A.where B.which C.when D.that 1.There (D) a dirty river here,but now it has become quite clean.A.would be B.ought to be C.has been D.used to be【为什么不选A?】2.What he said has us (A) all night.A.laughing B.to laugh C.laugh D.laughed【为什么不选C?】关于第一题 1.The water is ___. A.clear B.dirty C.busy D.busying2.There are some boats ___ the lake.A.at B.on C.from D.of 3.____ the lake a young man is reading.A.Between B.In C.Near D.Of There is a dirty ball under the bed.There is a dirty ball under the bed.(对under the bed进行提问) 1.There were dirty marks on her trousers _____ she had wiped her hands.A.where B.which C.when D.that2.He studied hard and later became a well-known writer._____his father had expected.A.that was what B.what was that C.which was what D.which was that3 高中英语定语从句题1.There were very dirty marks on her trousers ____ she had wiped her hands.A.where B.which C.when D.that2.If a shop has chairs ____ women can park their men ,women will spend more time in the shop.A.that B.which C.when D.wh 1.I can not stand jimmy ,He ( ) others for his own mistakes A always blamers B Is always blaming C always blamed D was always blaming2.There ( ) low and dirty houses,but what you can see now is a beautifal parkA can be B used to be C was D will be 英语翻译what a mess ,look at your room Man,there is either garbages or dirty socks . Dogs may make the grass dirty ,so there's a sign here:____dogs! a dirty street let's ask the robot if there's a discount on the old the CDs we like .they're always very -------A.cheap B.expensive C.old D.dirty横线上应填什么 答案是AADBA 我想问:为什么选这个答案为 什么选这个答案还有我这一PART的知识掌握地不够好 怎么办1.There were dirty marks on her trousers____she had wiped he hands.A.where B which C when D that2.he was educated at t He'd never want a dirty little child.这里He'd是什么的缩写?为什么?