要点
功能性语言（functional language）
I guess
might be
could
It's likely that..
语言功能句式
比较过去和现在
there are..than there were
much +比较级 than it used to be
compared to ...ago,现在完成时
....whereas thirty years ago....
in contrast
on the contrary
on the other hand
比较级
给出建议
I'd suggest doing..
I'd recommend that
I'd encourage to do
Maybe/perhaps/possibly, ..could/should...
解释原因
The main reason why..is because..
One reason why... is because
One possible explaination is
You could look at it this way:...
学会转述题目
I have no idea,but you know ,I do agree that...
