復(fù)合句
復(fù)合句分為并列復(fù)合句（也稱并列句）和主從或從屬?gòu)?fù)合句（也稱復(fù)雜句）。
Beijing is in the North and Nanjing is in the South.
特點(diǎn)：When two independent clauses, or complete sentences are joined together, they form one compound sentence.
復(fù)合句是由兩個(gè)獨(dú)立的句子組合在一起構(gòu)成的。例句中，有下面兩個(gè)完整并且獨(dú)立的句子組成：
Beijing is in the North.
Nanjing is in the South.
復(fù)雜句
復(fù)雜句，某個(gè)句子成分直接由從屬分句表示，那么這種句子便不是簡(jiǎn)單句而是復(fù)雜句。
My uncle, who is seventy years old, works on a farm.
特點(diǎn)：When an independent clause and a dependent clause are joined together; they form one complex sentence.
復(fù)合句是由一個(gè)獨(dú)立的句子加一個(gè)從句構(gòu)成的。
China is a country that its history is very long.
China is a country.(獨(dú)立句子)
That its history is very long(從句)