Example sentences of "know they must [vb infin] " in BNC.

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1 Tory campaign managers know they must hold key marginals like Darlington , Stockton South and York to ensure a historic fourth successive victory .
2 I know they must deliver to shops but why not at a specified time , say 8-9am , then the shops can open and people can shop without worry .
3 Sufferers with bad backs know they must avoid certain movements , such as bending with stiff legs , twisting on a fixed base or lifting heavy weights .
4 the same rules , do n't just say to them well , I know they must give them they give
5 Travel — Ferries : Ferry firms keep their heads above water With the Chunnel coming , ferry companies know they must smarten up their act if they are to keep custom .
6 They know they must fill the empty space with movement , whether there is scenery in the background or where the costumes are at their simplest and the background merely a hint of some venue as , for example , in Symphonic Variations or Requiem , or even just shafts of light as in Monotones .
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