Example sentences of "periods of [noun sg] when " in BNC.
Next page| No | Sentence |
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| 1 | Sometimes Greece 's place on the map can even help , in the periods of history when Europe is on easy terms with its neighbours to the east . |
| 2 | In forests with very seasonal production of fruits and seeds , as at Cocha Cashu , there are periods of scarcity when frugivores turn to a limited range of food sources , sometimes referred to as ‘ keystone ’ species . |
| 3 | There are occasional reports in the medical journals of people not sleeping for extended periods of time when suffering from illnesses interfering with brain function . |
| 4 | Classroom studies will involve observation and discussion with teachers and children and will include periods of time when standard assessment tasks are being completed . |
| 5 | I realised there were periods of time when this pool is hardly used , so I approached the management and asked if I could bring parties of residents here from Conway House . |
| 6 | They spread it all over Europe in competition with their bitter rivals the Rothschilds , who did not like the idea but were obliged to follow suit , and — as so often happens in periods of boom when financiers feel heroic and the money rolls in — it was much imitated , especially in Germany . |