Example sentences of "is when [noun sg] [noun] " in BNC.

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1 This is when scalp skin sheds excessively , leaving tiny flakes showing on hair and shoulders .
2 It is when ageist attitudes become part of the rules of institutions , govern the conduct of social life , and blend imperceptibly into everyday values and attitudes that they have a drastic effect on the way older people lead their lives .
3 In summary , it is when capital expenditure is financed from borrowing that we see the most fundamental difference between local government accounting and commercial accounting .
4 As previously explained , this is when keyboard input is expected .
5 This is when Beta Testing starts .
6 It is when family duties , responsibilities , roles and expectations are confused , uncertain or even mutually incompatible that problems within families arise .
7 An unlikely scenario : I 've never been to a desert and the nearest I 've ever got to authentic military action is when Action Man introduced eagle eyes and gripping hands .
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