2016職稱英語衛(wèi)生類語法之主謂一致：

以單數(shù)名詞或代詞、動詞不定式短語、動名詞短語或從句作主語時，謂語動詞一般用單數(shù)形式;主語為復數(shù)時，謂語動詞用復數(shù)形式。如：His father is working on the farm./ To study English well is not easy./ What he said is very important for us all./ The children were in the classroom two hours ago./ Reading in the sun is bad for your eyes.

注意：由what引導的主語從句，后面的謂語動詞多數(shù)情況用單數(shù)形式，但若表語是復數(shù)或what從句是一個帶有復數(shù)意義的并列結構時，主句的謂語動詞用復數(shù)形式。如：What I bought were three English books./ What I say and do is (are) helpful to you.