Example sentences of "that it [verb] [been] difficult " in BNC.
Next page| No | Sentence |
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| 1 | Not that it had been difficult , he thought disgustedly . |
| 2 | As far as the effect of knowledge about language on pupils ' own language skill is concerned , it is true that it has been difficult or impossible to show any direct cause-and-effect relation between teaching formal grammar and improved writing performance . |
| 3 | There have been so many taboos surrounding some kings that it has been difficult , if not impossible , to find anyone to be successor , for the taboos lead to total social isolation of the ruler . |
| 4 | Nevertheless , he says that it has been difficult to avoid the wholesale abandonment of a fascinating liturgical and musical tradition which had sound scholarly foundations . |
| 5 | Such is the wealth of historical literature that it has been difficult to decide what to give in notes in this chapter . |
| 6 | One reason for this lack of information is that it has been difficult to obtain pure enzymes that are sufficiently active under in vitro conditions . |