Example sentences of "[subord] [pron] have first " in BNC.

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1 A justification for talk of abstract ideas is that it provides an explanation of how our thought and knowledge can be general ; ‘ how we can know any proposition to be true of all particular triangles , except we have first seen it demonstrated of the abstract idea of a triangle . ’
2 This exercise should not be attempted until you have first acquired the firm foundations outlined earlier , and it is essential to use the material in the exact way suggested .
3 Do not administer anaesthetics ( ie MS222 ) unless you have first seen this done by a qualified person .
4 New versions of existing entries may not be stored in the database unless they have first been obtained for update by a known lexicographer , who is the only lexicographer allowed to return it .
5 ( c ) The police have no power to detain a person for questioning unless they have first arrested that person .
6 To begin with you can not see the animal at all , but after you have first noticed it , it becomes obvious .
7 Purchasers should be encouraged to meet with potential acquisition candidates at the earliest opportunity after they have first been approached .
8 Preferably , you should use the front kick only when you have first moved out of line and the opponent is unable to respond powerfully .
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