thus

1.下面两句里都把thus用在现在分词前面，那现在分词并不属于某个固定的名词，thus前面都有逗号：

• The tram stopped suddenly, thus causing the delay.
• Mr Fox fell ill, thus making it necessary for us to find a substitute for him.

这种结构在报纸里很普通，有时不用thus而用thereby。有人以为不正当，该把thus (或thereby)...ing改作以which引导的从句。例如：

• The tram stopped suddenly, which caused the delay.
• Mr Fox fell ill, which made it necessary for us to find a substitute for him.

2.thus and so是美国英语。例如：He told me that he had done thus and so in the matter. 在英国用thus或so，不用thus and so。