英文Conj嘅用法

一個句子有幾多個連接詞是無限制的

例如
Although he is very tired, he still wants to go to the movie with Jane and Mary because he has a crush on Mary.

Yes if you know how to add in appropriately.

This may help you to learn more about conjunctions:
http://www.grammar-monster.com/lessons/conjunctions.htm

usually,only one conj. is occurred in one sentence