usually,always后面第三人称单数加不加S?
2020-02-27
1、一般现在时,第三人称单数要加s。如: He always (usually) does his homework after dinner.
2、一般过去时,即使有usually,always等,也不用加s,而是用过去式。如: He always (usually) did his work after dinner last year.
3、如果前面有情态动词,如can,will,would,may,can,could,should,might,must,need等,或是不定式(动词前加to)的,就不用加s。
如: He can always do his homework by himself. He will usually do his homework after dinner.
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