Grammar教学实录与评析

1. as if / though引导的从句中

用法

谓语常见形式

例句

表示与现在事实相反

动词的过去式(be动词常用were)

She speaks English very fluently as if / though she were born in England.

表示与将来事实相反

would / could / might +动词原形

It seemed as if the meeting would never end.

表示与过去事实相反

had +动词-ed形式

Henry talks as if he had been abroad.

2. would rather后的从句中

谓语常见用法

形式

表示与现在事实相反

表示与过去事实相反

3. 在if only开头的简单句中

谓语常用法

见形例句

had +动词-ed形式

I would rather you hadn't told Mike the news that day.

动词的过去式(be动词常用were)

Bob would rather his girlfriend worked in the same department as he does.

例句

式

动词的表示与现在事实相反

过去式(be动词常用were)

would / 表示与将来事实相反

could / might +动词原形

had +动词-ed形式

If only I had listened to my parents!

If only it would stop raining!

If only I were better looking.

表示与过去事实相反

4. 表示“建议、命令、要求”等的动词后的宾语从句中

用法

谓语常见形式

例句

suggest, insist, demand, urge, command, request, require, desire, order, recommend等后的宾语从句中

(should +) 动词原形

Lucy suggested that the class meeting (should) not be held on SaturdayThe situation required that he be present.

5. 表示“建议、命令、要求”等的名词后的表语从句或同位语中

用法

谓语常见形式

例句

suggestion, order, proposal, request等后的表语从句或同位语中

(should +) 动词原形

My suggestion is that we (should) change the date.

She left her address with a request that any mail (should) be sent on to her.

6. It is (high) time后的从句中

在It is (high) time后的从句中，谓语动词常用过去式或“(should +) 动词原形”表示虚拟。

e.g. It is high time you made / (should) make up your mind.

7. 在It is necessary / important / essential / natural / strange / ... that ... 与It is requested / suggested / desired / proposed / ... that ... 结构中

在以上结构中，that从句中的谓语动词用“(should +) 动词原形”表示虚拟。

e.g. It is necessary that we (should) sort out the useful information.

It is proposed that this question (should) be discussed at the next meeting.