let him go;但是我想用when只修饰go,即they let him go when.的疑问句怎么变?(they asked him to leave and do I know when exactly he left?我想表达的是这个意思)
② If you could make him change his mindyou would save him a lot of trouble.这句话能不能看成不是虚拟?(因为如果这句话是间接引语,它的直接引语可能会有两种,一种是'If you can make him change his mindyou will save him a lot of trouble.' 还有种还是它不变)
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