五、容易混淆的连词:
[考试说明] 掌握并列连词(如:and、but、or)和从属连词(如:when、if、that等)的基本用法。
1. because since as for
[误] Because he was ill, so he didnt go to school today.
[正] Because he was ill, he didnt go to school today.
[正] He didnt go to school today because he was ill.
because通常表示说话人认为这种理由或原因是正式的理由。在含because的句子中,全句强调的重点在原因上,不在主句的结果上。因此,回答why提出的问题时,只能用because,不能用since、as或for。because of后面只能跟短语,不能跟从句。
since表示的原因,指人们已知的事实,常译为既然,引导的从句只是一种附带的说明原因,不是对原因的强调。because与since不能与so连用。
as表示原因与since差别不大,只是语气更弱,是显而易见的理由。
for表示因果关系时,可与because替换使用,所不同的只是它只能放在主句之后,不能放在句首。在含for的句子里,for从句有时只是对主句补充说明理由或推断原因,与前一分句不存在因果关系。
2.eitheror neithernor not onlybut also bothand
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