一、 一般現(xiàn)在時：
1.概念：經(jīng)常、反復發(fā)生的動作或行為及現(xiàn)在的某種狀況.
2.時間狀語： always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
3.基本結構：動詞 原形 （如主語為第三人稱單數(shù),動詞上要加（e）S）
4.否定形式：am/is/are+not;此時態(tài)的謂語動詞若為行為動詞,則在其前加don't,如主語為第三人稱單數(shù),則用doesn't,同時還原行為動詞.
5.一般疑問句：把be動詞放于句首；用助動詞do提問,如主語為第三人稱單數(shù),則用does,同時,還原行為動詞.
6.例句：. It seldom snows here.
He is always ready to help others.
Action speaks louder than words.
過去完成時表示過去某個時間以前已經(jīng)完成的動作,強調(diào)“過去的過去”.常以before, by+過去時間,或when, before等引導的過去時態(tài)的從句來表示,也可以通過上下文來表示.
　　【例如】
　　When I arrived at the station, he had already left.We had learned about 4000 English words by the end of last term.I waited until he had finished his homework.We were surprised at what she had done.We____our breakfast when an old man came to the door. (CET-4 1990,1)
　　A) just have had
　　B) have just had
　　C) just had
　　D) had just had
　　本題吃飯的動作在來的動作之前,考察過去完成時的用法,正確答案為D.
　　Before the first nonstop flight made in1949, it____necessary for all planes to land for refueling. (CET-4 1996, 6)
　　A) would be
　　B) has been
　　C) had been
　　D) would have been
　　本題時間狀語從句為一般過去時,主句的情況是在從句之前,是“過去的過去”,因此用過去完成時,答案為C.
　　Until then, his family____from him for six month.( CET-4 1997, 1)
　　A) didn't hear
　　B) hasn't been hearing
　　C) hasn't heard
　　D) hadn't heard
　　過去完成時可以表示過去某一時間以前已經(jīng)發(fā)生并繼續(xù)發(fā)生的事情,本句考察的正是過去完成時的這一用法,故答案為D.


現(xiàn)在進行時：
1.概念：表示現(xiàn)階段或說話時正在進行的動作及行為.
2.時間狀語：now, at this time, these days, etc.
3.基本結構：am/is/are+doing
4.否定形式：am/is/are+not+doing.
5.一般疑問句：把be動詞放于句首.
6.例句： How are you feeling today?
He is doing well in his lessons
現(xiàn)在完成時：
1.概念：過去發(fā)生或已經(jīng)完成的動作對現(xiàn)在造成的影響或結果,或從過去已經(jīng)開始,持續(xù)到現(xiàn)在的動作或狀態(tài).
2.時間狀語：recently, lately, since…for…,in the past few years, etc.
3.基本結構：have/has + done
4.否定形式：have/has + not +d one.
5.一般疑問句：have或has.
6.例句：I've written an article.
It has been raining these days.
一般將來時：
1.概念：表示將要發(fā)生的動作或存在的狀態(tài)及打算、計劃或準備做某事.
2.時間狀語：tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.
3.基本結構：am/is/are/going to + do；will/shall + do.
4.否定形式：was/were + not; 在行為動詞前加didn't,同時還原行為動詞.
5.一般疑問句：be放于句首；will/shall提到句首.
6.例句：They are going to have a competition with us in studies.
It is going to rain.
過去完成時表示過去某個時間以前已經(jīng)完成的動作,強調(diào)“過去的過去”.常以before, by+過去時間,或when, before等引導的過去時態(tài)的從句來表示,也可以通過上下文來表示. 構成had +過去分詞
　　【例如】
　　When I arrived at the station, he had already left.We had learned about 4000 English words by the end of last term.I waited until he had finished his homework.We were surprised at what she had done.We____our breakfast when an old man came to the door. (CET-4 1990,1)
　　A) just have had
　　B) have just had
　　C) just had
　　D) had just had
　　本題吃飯的動作在來的動作之前,考察過去完成時的用法,正確答案為D.
　　Before the first nonstop flight made in1949, it____necessary for all planes to land for refueling. (CET-4 1996, 6)
　　A) would be
　　B) has been
　　C) had been
　　D) would have been
　　本題時間狀語從句為一般過去時,主句的情況是在從句之前,是“過去的過去”,因此用過去完成時,答案為C.
　　Until then, his family____from him for six month.( CET-4 1997, 1)
　　A) didn't hear
　　B) hasn't been hearing
　　C) hasn't heard
　　D) hadn't heard
　　過去完成時可以表示過去某一時間以前已經(jīng)發(fā)生并繼續(xù)發(fā)生的事情,本句考察的正是過去完成時的這一用法,故答案為D.過去完成時表示過去某個時間以前已經(jīng)完成的動作，強調(diào)“過去的過去”。常以before, by+過去時間，或when, before等引導的過去時態(tài)的從句來表示，也可以通過上下文來表示。 構成had +過去分詞