虛擬語(yǔ)氣:'不可能'假設(shè)

與現(xiàn)在相反

條件句：過(guò)去式（were）

主句：would+動(dòng)詞原形

If I were you I would not be such scheming.

與將來(lái)相反

條件句：should/were to+動(dòng)詞原形

主句：would/should/could/might+動(dòng)詞原形

If it should be clear day tomorrow,I would bath my dog.

與過(guò)去相反

條件句: had +動(dòng)詞過(guò)去分詞

主句:would have +動(dòng)詞過(guò)去分詞

If I had known you are such scheming,I would not have trusted you.

虛擬語(yǔ)氣:愿望, 請(qǐng)求,建議，命令....

Wish

對(duì)現(xiàn)在的愿望: wish +動(dòng)詞過(guò)去式

I wish my neck don’t ached.

對(duì)過(guò)去的愿望wish + had/would have +動(dòng)詞過(guò)去分詞

I wish I had protected my neck from indisposition.

對(duì)將來(lái)的愿望: wish + should/would/could/might/ +動(dòng)詞原形

I wish my neck could cured.

demand, suggest,insist, order...+should +動(dòng)詞原形