Example sentences of "[vb infin] [adv] and when [pron] " in BNC.

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1 The student often becomes bored with the endless repetition of drills ; he is not necessarily able to transfer the patterns he has practised into creative communication outside a classroom situation ; and he does not necessarily know how and when it is appropriate to use the structures he has practised .
2 Do you know how and when it happened ? ’
3 The first task with a coin , as with any other artefact , is to try to establish its date and attribute it to a place of manufacture and authority , since we must know where and when it was made before it can give us any information about the past .
4 There are times when these ideas will occur naturally and when it will be appropriate , and this is for the child 's teacher to decide .
5 We shall see how and when they occur , and how they vary in different parts of the country . ’
6 But I know it will go away and when I see friends with babies I still think ‘ Oh , I want one now ! ’ ’
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