Question

三道英语不定式题目

1.He happened____(telephone)when I went in.
2.The girl pretended ___(listen)when the teacher looked at her.
3.Charles Babbage is generally considered ___the first computer.
A.TO have invented B.inventing C.to invent D.having invented

Answer 1

1.to telephone； sb happen to do sth： 某人碰巧做某事
2.to listen； pretend to do sth： 假装做某事；假装干…；假装去做某事
3.A； sb/sth be considered to do sth = It be considered to do sth被认为做了某事 在不定式中要表示过去发生的动作则用完成时态，如果仅用to do，通常则表示尚未或将要发生的动作。

Answer 2

to lelephone
to listen
C
这些东西前面的动词都要加不定式