改错;look who is they waiting for?He is talk to the doctor at the moment?改错;lots of students running in the park now.IS your sister working in a computer company?my mother and I am talking about our coming vacation .

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改错;lookwhoistheywaitingfor?Heistalktothedoctoratthemoment?改错;lotsofstudentsrunningintheparknow.ISyou

改错;look who is they waiting for?He is talk to the doctor at the moment?改错;lots of students running in the park now.IS your sister working in a computer company?my mother and I am talking about our coming vacation .
改错;look who is they waiting for?He is talk to the doctor at the moment?
改错;lots of students running in the park now.IS your sister working in a computer company?my mother and I am talking about our coming vacation .

改错;look who is they waiting for?He is talk to the doctor at the moment?改错;lots of students running in the park now.IS your sister working in a computer company?my mother and I am talking about our coming vacation .
look !who are they waiting for?He is talking to the doctor at the moment?
lots of students are running in the park now.
Does your sister work in a computer company?
my mother and I are talking about our coming vacation

1 who-》whom,他们在等谁?谁是宾语,因此要用whom(宾格)提问,而不是主格的Who
2 talk -> talking 现在进行时,用doing
3 running -> are running 现在进行时的构成是:be + doing,be动词不能缺少
4 is , working -> Does, work 表示现在经常发生的动作用一般现在时而不是现在进行时...

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1 who-》whom,他们在等谁?谁是宾语,因此要用whom(宾格)提问,而不是主格的Who
2 talk -> talking 现在进行时,用doing
3 running -> are running 现在进行时的构成是:be + doing,be动词不能缺少
4 is , working -> Does, work 表示现在经常发生的动作用一般现在时而不是现在进行时
5 am -> are,主语是my mother and I,两个人,动词用复数

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Look! Who (are) they waiting for?
He is ( talking ) to the doctor at the moment.
Lots of students (are) running in the park now。
Is your sister working in a computer company?(这句可以)
My mother and I (have been )talking about our (upcoming) vacation 。

look ! who are they waiting for? He is talking to the doctor at the moment?
lots of students are running in the park now。
Does your sister work in a computer company?
my mother and I are talking about our coming vacation