完成进行时与现在完成时比较

"          I have been drinking five cups of coffee this afternoon.(×)

"          I have drunk five cups of coffee this afternoon.

"          I have been living here for ten years.

       = I have lived here for ten years.

"          I have come here for ten years.(×)

"          I have been coming here for ten years.

现在进行时的基本用法

"          1. 表示说话此刻正在进行

"          2. 表示现阶段正在持续的动作，在说话的某个时刻这个动作不一定正在发生

"          Mr. White works with a chemical import-export company, but he  is working for the industrial fair, since he is on leave.

"          How are you getting along with your English? Is your English getting better？

"          3. 现阶段正在持续的动作使人不快

"          He is always messing up the kitchen.

"          4. 表示最近的将来已定的安排

"          I am taking a makeup test tomorrow.

"          现在进行时表达将来的计划，同理，过去进行时表达“相对过去的将来计划”。

"          be said to… 据说…

专四从句

"          The experiment requires more money than that/money has been put in.

"          There ought to be less anxiety over the perceived risk of mountain climbing than anxiety exists  in the public mind today.

"          I don’t like people who are never on time.

"          The food which was not in the fridge all went off.

"          The food, which was not in the fridge, all went off.

Language belongs to the cleaner as much as language belongs to the professor.

"          The day, which began brightly, ended with a violent storm.

"          I will never forget the time which I spent on campus.

"          He is the person who is known as a “bellyacher”

"          T-Bag is not the man that he used to be. = T-Bag is not what he used to be.

"          The indoor swimming pool seems to be a great more luxurious than the indoor swimming pool  is necessary.

"           Western Nebraska generally receives less snow than Eastern Nebraska receives. 

"          We know (that) the world is round.

"          I believe what he said.