(1) The point is that ... 重点/关键是…….

例：The point is that you have to keep your promise to help her with her English. 

关键是你得遵守诺言,帮她学习英语.

(2) The chance is that … 有可能……

例：The chance is that he will succeed. 他很有可能成功。

(3) The fact is that … 事实是……

例：The fact is that he hasn’t yet recover from illness. 事实是他还没有康复呢。

(4) The problem/question is that … 问题是……

例：The question is whether we should ask them for help.

问题是我们是否应该向他请求帮助。

(5) That is ---

例：That is where Lu Xun used to live. 这是鲁迅过去住过的地方。