`1` Mr.Green whom I met him at the supermaket yesterday taught me English last year .

`-` ''Mr.Green'' là chủ ngữ được nhắc đến `->` Dùng ''whom'' .

`2` That man who helped me yesterday is very kind .

`-` ''That man'' là chủ gữ làm hành động `->` Dùng ''who'' .

`3` My aunt gave me a present which was a toy car .

`-` ''A present'' là chủ ngữ vật `->` Dùng ''which'' .

`1.` Mr. Green whom I met at the supermaket yesterday, taught me English last year.

`2.` That man who helped me yesterday, is very kind.

`3.` My aunt gave me which was a toy car.

`××××××××××`

`-` `1`. Whom thay thế cho Tân ngữ (`Him`)

`-` `2`. Who thay thế cho Chủ ngữ (`He`)

`-` `3`. Which thay thế cho Vật (`it`)