Grammar
假設
通常題型是If+S+V, S+V，前面的S+V讓你知道，問你後面
Ex1. If we were not certain about the safety of the product, we ___ it.
- (A) had sold
- (B) don’t sell
- (C) will sell
- (D) would not sell
這題因為與事實相反（were not），因此後面是would not sell
would = 四大金剛，後面加原型動詞
If + S +were/V-ed 這裡注意，S後面一定是were
公式
If 裡面一定是現在簡單句（fi it rains），不管後面是指未來或過去
3. If it rains tomorrow, drive to work是命令的，因此不用主詞。
wish這裡重點是現在或是未來願望，後面子句都是過去式
如果是過去願望，後面子句是過去完成式
Example 3. If we _____ the budget on time, we wouldn’t have gotten adequate money for the project.
- (A) didn’t submit
- (B) not submitted
- (C) hadn’t submitted
- (D) don’t submit
Example 14. If Tim _____ the company, he would accept the project.
- (A) owns
- (B) will own
- (C) owned
- (D) has owned
Example 15. If our office ______ a coffee machine, Mr. White would make coffee every morning
- (A) has
- (B) had
- (C) will have
- (D) would have
因為後面是四大金剛wouldn’t have gotten)，代表與過去事實相反，因此前面為If S + had + Vpp或wouldn’t have
p.144 3. Had they known(不是knowing) the flight was delayed, they wouldn’t have come to the airport so early. ⇐這句是倒裝
P145 12. The order will be put through again if the details can be send（不是send，這句是被動） within the next 48 hours
P145 13.（重要） Should（萬一，if被省略，should往前拉） we receive your proposal before the end of the week, it will be taken into consideration.
最多考法
Should she receive
(if)
P145 15. If they have enough time, they can take inventory at the main warehouse this weekend.
p145 17.
(If Mrs. M should call, …)
Should Mrs. M call, please tell her she needs to send in a copy of her policy statement.
P145 18. Had they known that they would have to present their design to the mayor himself, A Designs would have redone(不是had redone) their entire presentation.
P145. 20. If there is(不是were) no one in the accounting department to pick up the phone, someone from another department should answer.
時間子句
與if相同，可對照上方公式
時間子句沒有現在進行式。
While
While+S+V(過去進行), S+V(過去進行).（過去兩個動作同時進行）
- Ex 1. While I was studying in my room, my sister was watching TV in the living room.
(Ever) since
(Ever) since + S + V簡單過去式, S + V 現在完成式.
- Ex 1. I have lived in Taoyuan (ever) since I was a child = (Ever) since I was a child, I have lived in Taoyuan.
PPT 10. As soon as the money ___ invested, the project will begin.
- (A) is
- (B) was
- (C) will be
- (D) has been
PPT 11. We have not had any problems with the photocopier ever since it ____ last month
- (A) repaired
- (B) has repaired
- (C) was repairing
- (D) was repaired
PPT 13. It appears certain that the computer was damaged when it was delivered(not: had delivered).
PPT 25. Ever since I was a child, I ____(am, will be, have been) afraid of dogs.