because,since,as和for

摘要

<正> because、since、as和for都可表示“原因”、“理由”,常译作“因为”、“由于”等。但它们之间也存在着差异。先请看下面几个例子: 1.The boy was absent because he was ill.那个孩子因病缺席. 2.I came here because I wanted to take the English course.我到