1, This is a dog which i had 5 years ago 

vì it thay thế cho từ a dog

2, this is a man who is my friend

vì he thay thế cho từ a man

3, that man who is my dad is sitting there 

vì từ he thay thế cho từ that man

4, i loved this guy whom i talked to yesterday

vì từ him thay thế cho từ this guy và ở vị trí tân ngữ

5, ha noi which is in the north of vietnam is beautiful

vì từ it thay thế cho từ hà nội

6, this is a man whose wallet was stolen yesterday 

vì his thế cho a man 

`color{red}{#lgdr}`

`1` This is a dog which I had `5` years ago .

`2` This is a man who is my friend .

`3` That man who is my dad is sitting there .

`4` I loved this guy whom I talked to yesterday .

`5` Ha Noi where is in the north of Vietnam is beautiful .

`6` This is man whose wallet was stolen yesterday .

`-` Giải thích : Ảnh .