第一种改法:The children lost their way in the forest.They didn't know what to do .
因为这里的do已经有了宾语what后面不用加it
第二种改法:The children lost their way in the forest.They didn't know how to do it.
how不能做do的宾语,所以要加上it.
如果在不改变原意的情况下,建议楼主用第一种改法.
第一种改法:The children lost their way in the forest.They didn't know what to do .
因为这里的do已经有了宾语what后面不用加it
第二种改法:The children lost their way in the forest.They didn't know how to do it.
how不能做do的宾语,所以要加上it.
如果在不改变原意的情况下,建议楼主用第一种改法.