考点四：动名词、不定式、名词性从句做主语时，谓语用单数。

　　What I said and did is of no concern to you.

　　我所说的与所做的与你没有关系。

　　Reading three classical novels is an assignment for the students during the holiday.

　　阅读三篇古典小说是学生们的假期作业。

　　To see is to believe.

　　眼见为实