求运用在英语作文中的短语、句式，高中的（不要太简单哦）

连接词:
<1>.so， and，then，but，or，however，yet等.
<2>. who，which，that，because，since，although，after，as，before，when，whenever，if，unless，as if等.
句式:
<1>.长短句交替使用.
<2>.简单句与复杂句交替使用.如各种从句,倒装句.
常见的有:
As far as I know...
As is known to all...
In my opinion...
Not only...but also...
It is time +s+过去式
Only by doing...can we(I,she,he,it...)...
An advantage of...is that...
The reason why...is that ...
That is the reason why ...
There is no doubt that ...

连接词:
<1>.so， and，then，but，or，however，yet等.
<2>. who，which，that，because，since，although，after，as，before，when，whenever，if，unless，as if等