一、形式一致:主语为单数形式,谓语用单数;主语是复数形式,谓语用复数。
名词、代词、不定式、动名词、从句等充当主语时以及由and, both… and连接并列主语时,一般适用形式一致原则。
[练一练] Someone _____ waiting for you outside. Nodding head ________ (mean) agreement. What you do ____ different from what you say. Both rice and wheat _____ (grow) in China.
is
means
is
are grown