英语中的“虽然……但是,though, but”,“因为……所以,beacuse, so”等关联词不能连用,只能用其中的一个连词。
因为though, because是从属连词,引导复合句;but, so是并列连词,引导并列句。一个句子不可能既是并列句又是复合句,所以though, but不能连用,beacuse, so不能连用。例句:
1. Though he is young, he knows much knowledge.He is young, but he knows much knowledge.2.Because Mary was ill, she was absent from school.或者:Mary was ill, so she was absent from school.

                            

                            
                                
                            
                                
                            
                            
                            
