however和whereas語法難點詳解

　　1. however和whereas

　　However和whereas的用法不同。請遵守下面的規(guī)則，以避免錯誤。

　　Use ‘however’ (followed by a comma) at the beginning of a sentence to contrast with the previous sentence:

　　在句首使用however(后面要加逗號)來表示和前一句意思相反。

　　Some people believe that schools are responsible for the behaviour of their students. However, others argue that discipline is the responsibility of parents.

　　Use ‘whereas’ (after a comma) to contrast two ideas in the same sentence:

　　Whereas用于同一句內(nèi)的兩個相反意見(前面要加逗號)。

　　Some people believe that schools are responsible for the behaviour of their students, whereas others argue that discipline is the responsibility of parents.

　　You can use ‘on the other hand’ or ‘by contrast’ in the same way as ‘however’. You can use ‘while’ instead of ‘whereas’.

　　On the other hand和by contrast的用法和however相同，而while和whereas的用法一樣。

　　2. while, whilst, whereas

　　While和whilst一樣，但whilst要更正式些(一本著名的語法書這么說的)。

　　Whereas is always used for contrast. While/whilst can be used for contrast, or to mean “at the same time”.

　　Whereas總是用于表示相反的意見。While和whilst既可以表示意思相反，也可以表示“與此同時”。

　　As can mean “because” or “exactly at the moment when”.

　　As可以表示“因為”，也可以指“就在那時”。

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