|   
			ESL Forum: 
			
			
			
			Techniques and methods 
			in Language Teaching 
			
			Games, activities 
			and teaching ideas 
			
			Grammar and 
			Linguistics 
			
			
			Teaching material 
			
			
			Concerning 
			worksheets 
			
			
			Concerning 
			powerpoints 
			
			
			Concerning online 
			exercises 
			
			
			Make suggestions, 
			report errors 
			
			
			Ask for help 
			
			
			
			Message board 
			  
			
			
			
			
			 | 
 		
		
		ESL forum >
		
		
		Grammar and Linguistics > GRAMMAR HELP IS NEEDED     
			
		 GRAMMAR HELP IS NEEDED 
		
			| 
				
					| 
					
					
 
 poroxod
 
   | 
						
							| GRAMMAR HELP IS NEEDED 
 |  
							|  Corn is a small area of hard skin on the foot ,especially the toe, _____ is sometimes painful.   A) where    B) which    C) that    D) B,C   Which answer is correct? Can we use "that" in non-defining relative clause? I mean can we use "that" after comma in the sentences like these?   Please, if possible can you give some sentences like these to prove the answer.   Thanks in advance. |  16 Mar 2016      
					
					 |  |  
			| 
 
					
					
					
				 
 |  
			| 
				
					| 
					
					
 
 joannajs
 
   | 
						
							| Hi there,    In a non-definining clause only "which" can be used, so the right option here is B. "That" or "which" is interchangeable in defining clauses (without a comma :-)   Farmville, which is a popular online game, seems to be often played through Facebook. Bitcoins are a currency which/that you can exchange for real dollars. [I guess    ]   best from Poland,   joanna  |  16 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 almaz
 
   | 
						
							| Are you really sure that it can only be a non-defining relative clause � bearing in mind that the commas serve to parenthesize the phrase "especially the toe"? Take that phrase away and you would have:   A corn is a small area of hard skin on the foot which/that is sometimes painful.    [note "A corn" �  it�s countable]    You may of course consider that the painfulness of corns is less important than the location or the hardness of skin, in which case you could parse the relative clause as non-defining (or non-restrictive or non-identifying or supplementary � whatever your preference) and you wouldn�t use �that� as a relativizer. |  16 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 yanogator
 
   | 
						
							| I agree with Alex, that the comma is there only because of "especially the toe", so both "which" and "that" are correct.   Bruce  |  16 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 samet2015
 
   | 
						
							| "which" is correct. You cannot use that where there is a comma. |  16 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 alien boy
 
   | 
						
							|  I �m with Bruce & Alex on this one. The answer is D) both B & C.   Cheers, AB  |  16 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 poroxod
 
   | 
						
							|  Thanks greatly for your discussions. After searching for a long time, I have found the same sentence in Oxford Advanced Learner �s dictionary by HORNBY. "That" is written there. So, I came to conclusion that "which" is also can be used.  In another source Macmillan Advanced Learner �s Dictionary it is mentioned "that is" is used when explaining more clearly what you have just said. |  17 Mar 2016     
					
                     |  |  
			| 
				
					| 
					
					
 
 yanogator
 
   | 
						
							| poroxod, The use of "that is" that you mentioned is completely separate from this discussion. We also use "That is to say..." to add an explanation.   I have a corn on my toe. That is, I have a small area of hard skin that is sometimes painful.   Bruce  |  17 Mar 2016     
					
                     |  |  
	
	   |