relative clauses

relative clause 令你可以將d有關既句子連埋一齊,而唔駛講個subject兩次
首先你要明白, 你唔可以將太多information放哂o係一句句子裡面,睇睇:
有個女仔同john講野,你想問個女仔係邊個....
如果冇relative clause,咁你就要講:
A girl is talking to John. Do you know her?
你要用2句句子去講...
但係如果有relative clause, 咁就唔同喇...
Do you know the girl who is talking to John?
咁你就用一句句子講哂喇, 簡潔好多
睇多一個例子,你想話你o係某某舖頭買左件衫...
兩句: This is a botique. I bought this T-shirt here.
relative clause: This is the botique where I bought this T-shirt.
這是relative clause 最最最最基本既好處, 而有好多好多用法唔可以太詳細講,你可以去這個hoempage睇下,好唔錯架
http://www.ego4u.com/en/cram-up/grammar/relative-clauses

為甚麼要用who which that呢？連接2句句子,做到複合句子效果

而不直接說呢？可以令句子簡潔d

有甚麼用途和好處啊？用途係連接2句句子,好處係可以令句子簡潔d因為subject只須寫一次就可以了