与现在相反
条件句:过去式(were)
主句:would+动词原形
If I were you I would not be such scheming.
与将来相反
条件句:should/were to+动词原形
主句:would/should/could/might+动词原形
If it should be clear day tomorrow,I would bath my dog.
与过去相反
条件句: had +动词过去分词
主句:would have +动词过去分词
If I had known you are such scheming,I would not have trusted you.
Wish
对现在的愿望: wish +动词过去式
I wish my neck don’t ached.
对过去的愿望wish + had/would have +动词过去分词
I wish I had protected my neck from indisposition.
对将来的愿望: wish + should/would/could/might/ +动词原形
I wish my neck could cured.
demand, suggest,insist, order...+should +动词原形
有话要说...