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          Look! David is helping his mother _______ the room.
          A．is cleaningB．cleaning C．cleans D．clean
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：看！戴維正在幫助他的媽媽整理房間。help sb (to)do sth幫助某人做某事，故選D
          點(diǎn)評：現(xiàn)在進(jìn)行時(shí)表示動作正在進(jìn)行，由be + doing構(gòu)成，be為助動詞。初學(xué)者最容易漏掉，它應(yīng)與主語的人稱和數(shù)保持一致。習(xí)慣于look（看），listen（聽）等表動作的動詞連用。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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