He described where they had landed.为何不可用landed on?
问题描述:
He described where they had landed.
为何不可用landed on?
答
He described on which they had landed.
答
因为前边是where,where中已经包含介词.
如果把where改成which,后边就必须用landed on了.
做这种类型的问题可以采用还原的方法.