since 

  1. 連接詞
自...以來
從...至今
/以上通常用於接現在完成式或過去完成式的完整句/
因為, 由於
既然

    同義字詞
as,as long as,because,'cause,considering,for,inasmuch as,now,seeing,whereas

  2. 副詞
通常用於修飾現在完成式與過去完成式:
此後, 之前
以前
自那以後
從那時到現在

    同義字詞
ago,back

  3. 介系詞
通常用於接現在完成式:
自...以來
自從...
從...至今

    
                        
    4. 
                                            

                

            

            
            

                

                
例句

                

                    
    
                                                    
  1. 
                                I had this "condition" since birth.                            
    2. 
                                                    
  2. 
                                What if Jinny had changed since I'd been gone?                            
    3. 
                                                    
  3. 
                                The nomes who haven't done so well since the Drive.                            
    4. 
                                                    
  4. 
                                I was in acoma for a week and had 5 surgeries since .                            
    5. 
                                                    
  5. 
                                There has been a full-fledged parish there since 1926.                            
    6.