1、首先我们还是看一个句子，尝试对下面的句子进行简化。While he was playing game, the boy heard a noise coming from the bedroom.对前半部分的时间状语从句进行简化。
3、N2 需要考虑几个问题n1 连词是否需要保留这主要取决于句子的含义，只有无碍于句子的意思表达即可省略如进一步简化成：Playing games, the boy heard……
5、n2 没有be动词和助动词情况咿蛙匆盗动词变现在分词，主语省略，连接词看含义如：Because we having nothing to do ,we migjy as well as 爿讥旌护go home.转变成：Having nothing to do, we……
