is

This is what we support..这是我们所拥护的。

I agree that she is the ablest of us..我承认她是我们之中最能干的一个。

This is all I have..这就是我的全部家当。

which is,哪个是；从句的表达形式之一

that is,即；就是说；换言之

he is,他是…

what is,什么是

who is,谁是

she is,她是

is required,是必须的

as it is,实际上；事实上；既然如此

is coming,正过来

is likely to,有可能…

as is,[口]照原来的样子；本来就是这样；不予改变

what it is,原因；事实真相；理由

is equal to,等于

what is more,而且

there is no doubt,毫无疑问

tomorrow is another day,明天又是崭新的一天

nothing is impossible,没有什么不可能

what love is,n. 爱是什么（美国喜剧）

here it is,在这里；给你；给你看看

time is money,时间就是金钱；一寸光阴一寸金