While和But表转折的用法区别

While作并列连词用，意思为“而，然而”，表对比。而but表转折。注意用心比较体会while与but的句中用意

1.Some people waste food while others haven't enough.

有些人很费粮食，然而有些人却吃不饱。

2.The son was having a good meal at home，while the parents were working in the fields.

儿子在家吃好饭而父母却在田里辛勤劳作。

3.I ought to have helped her，but I never could.

我本该帮她但没能。

4.Honey is sweet，but the bee stings.

蜂蜜很甜，但蜜蜂有刺蜇人。

while是虽然的意思， but是但是的意思。
中文理解起来应该容易多了吧。