强调句有没有时态?

强调句中的动词 be 要根据原句的时态选择不同的时态形式，如：

1、对将来或现在情况的的强调

把 he will pay a vist to his friend 改为强调句——
* 强调主语：It is he that/who will pay a visit to his friend.
* 强调宾语：It is his friend that/who he will pay a visit to.

把 He always stay late into the night（他总是熬夜）改为强调句——
* 强调主语：It is he who always stay late into the night
* 强调状语：It is late into the night that he always stay.

2、对过去情况的强调

把 He said he would pay a visit to his friend 改为强调句——
* 强调主语：He said it was he that/who would pay a vist to his friend.
* 强调宾语：He said it was his friend that/who he would pay a visit to.

把 He used to stay late into the night（他总是熬夜）改为强调句——
* 强调主语：It was he who used to stay late into the night.
* 强调状语：It was late into the night that he used to stay.

有过去式的变化形式