in keeping - to keep

britfan

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Joined
Jan 31, 2017
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Student or Learner
Native Language
German
Home Country
Germany
Current Location
Germany
What is about "in keeping out" and "to keep out"? Are both forms possible?
Window screens are effective in keeping out/to keep out mosquitoes.
Window screens are an effective way in keeping out/to keep out mosquitoes.
 

emsr2d2

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Staff member
Joined
Jul 28, 2009
Member Type
English Teacher
Native Language
British English
Home Country
UK
Current Location
UK
[STRIKE]What is[/STRIKE] I would like to ask you about "in keeping out" and "to keep out"​. Are both forms possible?

Window screens are effective in/at keeping out [STRIKE]/to keep out[/STRIKE] mosquitoes.
Window screens are an effective way [STRIKE]in keeping out/[/STRIKE] to keep out mosquitoes.

See above. They're both possible but they're not interchangeable. The rest of the sentence dictates which one you need. I've added "at" to the first sentence because that's the usual collocation in BrE.
 
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