call sb的用法及短语

call on sb 拜访或看望某人。

call sb sth 为某人叫某物。

call on sb to do sth叫某人做某事。

He called on them that evening.

他那天晚上去拜访了他们。

I called upon Mrs Foster this evening.

我今晚去看望了福斯特太太。

Please call me a taxi.

请帮我叫一辆出租车。

Then the teacher called on me to answer the question.

这里老师叫我回答问题。

We are calling on you to help us.

我们恳请你帮助我们。