Grammar -conditional sentences

SECOND CONDITIONAL:
[適用於將來 (future) 或現在 (now), 大多數不會發生或者不能發生]

If + past tense simple, would/wouldn’t + infinitive without to

小心: 雖然用 past tense, 不是代表過去

1. It can describe an improbable future event or situation. The condition is unlikely to be fulfilled because the future event is unlikely to happen:
If the result were positive, we would call you within two days.

2. It can also describe a hypothetical current situation or event i.e. one which is contrary to known facts. It is therefore impossible to fulfill the condition.

If the police were confident of their case against Mr. Brown, surely they wouldn’t hesitate to arrest him.(= The police are not confident of their case.)

If I had lots of money, I would travel round the world.
(問題現在我沒有許多錢, 不能說100%完全無機會, 或者今晚中彩票)
I only imagine that I have lots of money.

You also use second conditional for giving advice, polite request and desire/regret.
If I were you, I would take her out of that school.


THIRD CONDITIONAL:
[適用於過去.(past) 已經發生了, 不能改變.]

If + past perfect, would/wouldn’t have + past participle

This is also known as the past or impossible condition.

If you had worked harder, you would have passed your exam.
(考試結果已經知道, 不及格)

If you had taken a taxi, you would have got here in time.

Here the verbs forms refer to something unreal, to an imaginary past action. The past event did not happen.

conditional sentences type 2 are condition precedent that must be fulfilled before a marriage request becomes valid for her Marry.
impossible past conditions are If wishes were horses,beggars would fly!