1.Uncertain present condition(與現在事實不確定)
If John has enough skill, he can operate this machine.
如果John有足夠的技巧,他可以操作這台機器。
2.Uncertain future condition(與未來事實不確定)
If John has enough skill, he will operate this machine next year.如果John有足夠的技巧,他明年將可以操作這台機器。
3.Contrast to present condition(與現在事實相反)
If John had enough skill, he would operate this machine.
如果John有足夠的技巧,他可以操作這台機器。
4.Contrast to past condition (與過去事實相反)
If John had had enough skill, he would have operated this machine last
year.
如果John過去有足夠的技巧,他去年就可以操作這台機器。
5.Uncertain present condition(與現在事實不確定)
If John is a worker, he can operate this machine.
如果John是一個工人,他就可以操作這台機器。
6.Uncertain future condition(與未來事實不確定)
If John is a worker, he will operate this machine next year.
如果John是一個工人,他明年將可以操作這台機器。
7.Contrast to present condition(與現在事實相反)
If John were a worker, he would operate this machine.
如果John是一個工人,他就可以操作這台機器。
8.Contrast to past condition (與過去事實相反)
If John had been a worker, he would have operated this machine last year.
如果John過去是一個工人,他去年就可以操作這台機器。
9.Contrast to present condition(與現在事實相反)
John wish he had enough skill.
John希望他有足夠的技巧
10.Contrast to past condition (與過去事實相反)
John wish he could have operated this machine.
John希望他可以操作這台機器。 |