什么情况下be是不用变成am is are was were 的
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什么情况下be是不用变成am is are was were 的
什么情况下be是不用变成am is are was were 的
什么情况下be是不用变成am is are was were 的
和 情态动词can, must,may ,will,would等等连用时,用be动词原形
比如,He may be right 他可能是对的
有些词是后面要加动词原形,如must may ....,不用变am is are
跟在情态动词后面时用BE。
1.动词不定式后面如:I want to be a doctor.
2.情态动词后,如:can,may,could,shall.should.
3祈使句中:Don't be late.Be careful.