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 aloga
 
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							| Help! 
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							| Give a question for the underlined words:   "She started focusing on this idea."   And my question is: Is it absolutely necessary to include on in the question or not?   Thanks a lot, Ana |  20 Feb 2013      
					
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 MoodyMoody
 
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							| Yes, on is necessary in this sentence. For the question, it depends on the context. The most natural-sounding question is "What did she start focusing on?" However, to appease the grammar police in formal settings, I would use "On what did she start focusing?" Supposedly you shouldn �t end a sentence with a preposition. Never mind that the second answer sounds pretentious and unnatural. |  20 Feb 2013     
					
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 aloga
 
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							| First of all, thanks. 
 Second, there is no context, it �s just a grammatical exercise in "Selectividad". The students are requested to give a question, that �s all.
 
 They should always include on in the question, beginning or end, is that right?
 
 
 
 |  20 Feb 2013     
					
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 Zora
 
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							| Actually, the  �on � is necessary because of  �focus �, but not because it �s a question. In fact,  �on this idea � is a phrase which can come at the beginning or end: 
 On this idea, she started focusing. OR She started focusing on this idea.
 
 
 
 |  20 Feb 2013     
					
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