1.Mostofuswillhavethesecomputersourlifebetter.A.makeB.makesC.tomakeD.made2.Itisagoodwaysomefromyourparents.A.togetB.gettingC.gets3.Youdon'texplainwhyyoudidn'tcometomypartyyesterday.A.needB.needtoC.needfor4.H

Question

1.Most of us will have these computers__our life better.
A.make B.makes C.to make D.made
2.It is a good way__some from your parents.
A.to get B.getting C.gets
3.You don't ___explain why you didn't come to my party yesterday.
A.need B.need to C.need for
4.He felt well enough __exercise.
A.took B.taking C.to take
为什么1\2\4题都是用to do sth
第4题为什么用need to

Answer 1

124用to do sth是不定式做目的状语
3 的need是实义动词,不是情态动词,所以不是need do sth,从don't可以判断,情态动词是不跟在助动词后面的,只有实义动词才有数和时态的变化的.need 做为实义动词的用法是 Need to do sth需要做某事,need doing sth需要被做某事
need做情态动词的用法是need do sth 后接动词原形.