Theteacheraskedustodoourhomework．A.didn'tforgetB.notforgetC.nottoforgetD.don'tforget

Question

The teacher asked us________to do our homework．
A.didn't forget
B.not forget
C.not to forget
D.don't forget

Answer 1

答案C
分析：动词不定式的否定形式是not to do(如果是不带to的动词不定式,就是not do,如果要强调这种否定,也可以用never来代替not,成为never to do形式),和动词谓语的否定结构是不同的(not总是放在谓语结构的第一个词的后面,如：am not,is not,were not,shall not,would not,have not,had not,does not,do not,did not等).此处asked us to do结构,其否定形式应该是asked us not to do．