must 后面是加to do sth.还是do sth. ???

2024-11-01 12:45:11
推荐回答(2个)
回答(1):

must是情态动词,后面必须用动词原形
must
do
sth
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回答(2):

都可以,因为need
do
sth时的need是情态动词,所以后面跟动词原形,而need
to
do
sth,的need是实意动词,所以后面跟to
do.