when引导时间状语从句与引导并列分句的区分怎么区分他们呢?比如两个句子It rained when we have planting trees.复合句We were planting trees when it rained.并列句仅仅靠意思区分吗?

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when引导时间状语从句与引导并列分句的区分怎么区分他们呢?比如两个句子It rained when we have planting trees.复合句We were planting trees when it rained.并列句仅仅靠意思区分吗?

when引导时间状语从句与引导并列分句的区分怎么区分他们呢?比如两个句子It rained when we have planting trees.复合句We were planting trees when it rained.并列句仅仅靠意思区分吗?
when引导时间状语从句与引导并列分句的区分
怎么区分他们呢?比如两个句子
It rained when we have planting trees.复合句
We were planting trees when it rained.并列句
仅仅靠意思区分吗?

when引导时间状语从句与引导并列分句的区分怎么区分他们呢?比如两个句子It rained when we have planting trees.复合句We were planting trees when it rained.并列句仅仅靠意思区分吗?
We were planting trees when it rained.
We had planted trees when it rained.
We were going to plant trees when it rained.
如果前面的句子的动词形式是上面三种情况,那么wheny引导的从句就是并列句,这种句型通常表明了when这个句子发生的突然性,常常会加一个副词suddenly(也可不用).