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<br>1.Somepeoplewastefoodwhileothershaven'tenough.<br>有些人很费粮食,然而有些人却吃不饱。<br>2.Thesonwashavingagoodmealathome,whiletheparentswereworkinginthefields.<br>儿子在家吃好饭而父母却在田里辛勤劳作。<br>3.Ioughttohavehelpedher,butInevercould.<br>我本该帮她但没能。<br>4.Honeyissweet,butthebeestings.<br>蜂蜜很甜,但蜜蜂有刺蜇人。
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