1.一般現在時的用法
1) 經常性或習慣性的動作，常與表示頻腮度的時間狀語連用。
時間狀語： every…, sometimes, at…, on sunday
i le**e home for school at 7 every morning.
2) 客觀真理，客觀存在，科學事實。
the earth moves around the sun.
shanghai lies in the east of china.
3) 表示格言或警句中。
pride goes before a fall. 驕者必敗。
注意：此用法如果出現在賓語從句中，即使主句是過去時，從句謂語也要用一般現在時。
例：columbus proved that the earth is round..
4) 現在時刻的狀態、能力、性格、個性。
i don』t want so much.
ann wang writes good english but does not speak well.
比較：now i put the sugar in the cup.
i am doing my homework now.
第一句用一般現在時，用於操作演示或指導說明的示範性動作，表示言行的瞬間動作。再如：now watch me, i switch on the current and stand back.
第二句中的now是進行時的標誌，表示正在進行的動作的客觀狀況，所以後句用一般現在時。
2. 一般過去時的用法
1)在確定的過去時間裡所發生的動作或存在的狀態。
時間狀語有：yesterday, last week, an hour ago, the other day, in 1982等。
where did you go just now?
2)表示在過去一段時間內，經常性或習慣性的動作。
when i was a child, i often played football in the street.
whenever the browns went during their visit, they were given a warm welcome.
3)句型：
it is time for sb. to do sth "到……時間了" "該……了"
it is time sb. did sth. "時間已遲了" "早該……了"
it is time for you to go to bed. 你該睡覺了。
it is time you went to bed. 你早該睡覺了。
would (had) rather sb. did sth. 表示』寧願某人做某事』
i』d rather you came tomorrow.
4) wish, wonder, think, hope 等用過去時，作試探性的詢問、請求、建議等。
i thought you might h**e some. 我以為你想要一些。
比較：一般過去時表示的動作或狀態都已成為過去，現已不復存在。
christine was an invalid all her life.
(含義：她已不在人間。)
christine has been an invalid all her life.
(含義：她現在還活著)
mrs. darby lived in kentucky for seven years.
(含義：達比太太已不再住在肯塔基州。)
mrs. darby has lived in kentucky for seven years.
( 含義：現在還住在肯塔基州，有可能指剛離去)
注意： 用過去時表示現在，表示委婉語氣。
1)動詞want, hope, wonder, think, intend 等。
did you want anything else?
i wondered if you could help me.
2)情態動詞 could, would.
could you lend me your bike?
3. used to / be used to
used to + do："過去常常"表示過去習慣性的動作或狀態，但如今已不存在。
mother used not to be so forgetful.
scarf used to take a walk. (過去常常散步)
be used to + doing： 對……已感到習慣，或"習慣於"，to是介詞，後需加名詞或動名詞。
he is used to a vegetarian diet.
scarf is used to taking a walk.(現在習慣於散步)
典型例題
---- your phone number again? i ___ quite catch it.
---- it』s 69568442.
a. didn』t b. couldn』t c. don』t d. can』t
答案a. 本句雖沒有明確的時間狀語，但從語意上看出，在聽的時候沒有聽懂這個動作發生在過去，因此應用過去時。
4. 一般將來時
1) shall用於第一人稱，常被will 所代替。
will 在陳述句中用於各人稱，在爭求意見時常用於第二人稱。
which paragraph shall i read first.
will you be at home at seven this evening?
2) be going to +不定式，表示將來。
a. 主語的意圖，即將做某事。
what are you going to do tomorrow?
b. 計畫，安排要發生的事。
the play is going to be produced next month。
c. 有跡象要發生的事
look at the dark clouds, there is going to be a storm.
3) be +不定式表將來，按計畫或正式安排將發生的事。
we are to discuss the report next saturday.
4) be about to +不定式，意為馬上做某事。
he is about to le**e for beijing.
注意：be about to 不能與tomorrow, next week 等表示明確將來時的時間狀語連用。
5. be going to / will
用於條件句時， be going to 表將來
will 表意願
if you are going to make a journey, you』d better get ready for it a s soon as possible.
now if you will take off your clothes, we will fit the new clothes on you in front of the mirror.
6. be to和be going to
be to 表示客觀安排或受人指示而做某事。
be going to 表示主觀的打算或計畫。
i am to play football tomorrow afternoon. (客觀安排)
i』m going to play football tomorrow afternoon. (主觀安排)
7. 一般現在時表將來
1)下列動詞：come, go, arrive, le**e, start, begin, return的一般現在時表將來。這主要用來表示在時間上已確定或安排好的事情。
the train le**es at six tomorrow morning.
when does the bus star? it stars in ten minutes.
2)倒裝句，表示動作正在進行，如：
here comes the bus. = the bus is coming.
there goes the bell. = the bell is ringing.
3)在時間或條件句中。
when bill comes (不是will come), ask him to wait for me.
i』ll write to you as soon as i arrive there.
4)在動詞hope, take care that, make sure that等後。
i hope they h**e a nice time next week.
make sure that the windows are closed before you le**e the room.
11. 用於現在完成時的句型
1)it is the first / second time…. that…結構中的從句部分，用現在完成時。
it is the first time that i h**e visited the city.
it was the third time that the boy had been late.
2)this is the… that…結構，that 從句要用現在完成時.
this is the best film that i』ve (ever) seen.
這是我看過的最好的電影。
this is the first time (that) i』ve heard him sing. 這是我第一次聽他唱歌。
典型例題
(1) ---do you know our town at all?
---no, this is the first time i ___ here.
a. was b. h**e been c. came d. am coming
答案b. this is the first time 後面所加從句應為現在完成時，故選b。
(2) ---h**e you ____ been to our town before?
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