<正> 1.误:Since the pen does not work well,then let’s try another.正:Since the pen does not work well,let’s try another.析:since 引导的从句,既表示原因,又表示条件,意为“既然……那么就……”所以 since 后不能再加 then.2.误:The word can be used both as a noun as well as a verb.正:The word can be used as a noun as well as a verb.析:“both…and”与“as well as”在意义上虽有相似之处,但在连接句子时,不能混用。