英文:conditional setences

唔係...唔同tense有唔同意思..睇下我寫俾你個site, 好多examples:

1) These are facts, 'If' can be replaced with 'when' or 'whenever'

If you heat water to 100 degrees celsius, it boils.
If you don't eat for a long time, you become hungry.
If the sea is stormy, the waves are high.

2) condition clause with past tense, result in the past, present, or future.

已發生, 不能改變的假
If she had taken that flight yesterday, she would have arrived at 10pm. If she had taken that flight yesterday, she would be with us now.

未知的可能
If she took that flight yesterday, she is somewhere in town today.
If she took that flight yesterday, we will see her tomorrow.

3) condition clause in present, result in the past, present, or future.

If it's raining here now, then it was raining on the West Coast this morning.
If it's raining now, then your laundry is getting wet.
If it's raining now, there will be mushrooms to be picked next week.
If it rains this afternoon, then yesterday's weather forecast was wrong.
If it rains this afternoon, your garden party is doomed.
If it rains this afternoon, everybody will stay home.
If I become President, I'll lower taxes.

4) condition clause and result in future.

(The weather forecast says it's going to rain.) Well, if it will rain, we must take umbrellas.

5) If you will
If you'll [you will] just hold the door open for me a moment, I can take this table out to the kitchen.
If you will keep all the windows shut, of course you'll get headaches.
If you will excuse me, I think I will slip into something more comfortable.

If aspirins will cure it, I'll [I will] take a couple tonight instead of this horrible medicine.

全部完整的conditional setences，看這裡

係吳一定架! Conditional sentences有四種, 分別由type 0 to 3! 現在式係type 0, 表示事實, 而呢句係type 1, if句後面果句係用將來式, 即係I will pass the exams, 用來表示將來可能會發生既事情!