1)call on/upon,指名要(某人)去干(某事);请求;号召;动用2)Pray sb. to do sth.,请求某人做某事3)ask a boon of a person,请求某人4)Give sb. an incentive to do sth.,激发某人去干某事5)ask for a person's autograph,请某人签名6)Petition sb. to do sth.,祈求某人做某事
用法和例句
Ask sb, esp politely, in speech or writing to do sth
(以口头或书面形式)要求,(尤指)请求某人做某事
encourage sb. To do sth.
鼓励某人(做某事)
You use“ let” when you are offering to do something, making suggestions, or telling someone to do something.
祈使句用以请求或告诉某人做某事,提出建议,警告或指示。
be necessary (for one) to do something (go somewhere)