Example sentences of "be [verb] [prep] longer period " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | We were very impressed with the machine 's ergonomics , allowing the machine to be used for longer periods than the conventional straight shaft models . |
| 2 | This treatment should not be maintained for longer periods because of the risks of haemosiderosis , red cell sensitisation and infection associated with transfusion . |
| 3 | Normally our tours were confined to three months but occasionally , according to the availability of experienced officers , this might be extended to longer periods . |
| 4 | Transparencies can be studied for longer periods than drawings on the board , and no time is consumed by drawing during the lesson . |
| 5 | But what is more troubling than the initial rigid fixed term is the fact that warrants may be renewed for longer periods still . |
| 6 | A recent view is that a postsynaptic kinase is activated transiently ( for less than a few minutes following the tetanus ) and a presynaptic kinase is activated for longer periods ( but for less than 1 hour ) . |