This is the pen which I lost yesterday.这是我昨天丢的那只笔.
which 引导定语从句,修饰前面的pen ,这是那只笔,哪只?我昨天丢的那只
I love what I have.我爱我所拥有的.
what 引导宾语从句,做love 的宾语,我爱什么?我爱我拥有的东西.
This is the pen which I lost yesterday.这是我昨天丢的那只笔.
which 引导定语从句,修饰前面的pen ,这是那只笔,哪只?我昨天丢的那只
I love what I have.我爱我所拥有的.
what 引导宾语从句,做love 的宾语,我爱什么?我爱我拥有的东西.