A verb is a word that expresses the action，condition，or state of being．A verb is an essential part of the predicate of every sentence and every clause．Without at least one verb，a group of words can be neither a sentence nor a clause．

动词表明动作或事物所处的状态。动词谓语是任何英文句中必不可少的成分。

Ms．Pike signs all checks over $ 500．

Jason has been away on a business trip．

I am the assistant director．

Mr．Wang should have been asked to attend this meeting．