if条件句的三种时态类型
回答
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2022-08-20
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主句:主语+would/should/might/could+动词原形;
从句:should+动词原形/were to+动词原形;
2、提出现在的条件:
主句:主语+would/should/might/could+动词原形;
从句:动词过去式
扩展资料
3、提出过去的未发生的条件:
主句:主语+would/should/might/could have+动词过去分词
从句:had+动词过去分词
例句: If I had read the book, I would have told you about it.如果我读了这本书,我早就告诉你了。