if you have learned it well ,you ______ do these exercises

题目

if you have learned it well ,you ______ do these exercises
if you have learned it well,you ____ do these exercises.
A.don't need B.needn't to C.don't have D.don't have to

答案

选D首先NEED可以做实义动词,有动词词组need to do ,其否定形式为don't neeed to do译为：需要做什么；need 也可作助动词（诸如will,can.),所以又可加动词原形,即need do,也是“需要做什么”的意思第一项：need作实义...