逗號(hào)表示句子內(nèi)部的一般性停頓。兩個(gè)具有獨(dú)立含義的句子，在沒有連詞的情況下簡單地被一個(gè)逗號(hào)隔開是不正確的。改正這樣的錯(cuò)誤須用句號(hào)或分號(hào)代替逗號(hào)，或用并列連詞(and， but， or， so， nor， yet)連接兩個(gè)句子，或用從屬連詞(because，as， although等)，否則會(huì)導(dǎo)致句子出現(xiàn)語法錯(cuò)誤。
錯(cuò)例：Some people believe children in secondaryschool should study international news as a subject， others think that’sa waste of time.
正解：Some people believe children in secondaryschool should study international news as a subject. However， others think that’s a waste of time.
或：Some people believe children in secondaryschool should study international news as a subject， but others think that’s a waste of time.
改錯(cuò)練習(xí)：
1. Students should do some housework， it is goodfor them to be independent.
2. They are far away from parents and friends， theycan deal with everything by themselves.