Example sentences of "but [subord] [adv] [pron] has " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | It has been suggested that similar reactions may take place on background sulphate aerosols in the Antarctic stratosphere , but as yet there has been no unambiguous evidence for these reactions in the absence of polar stratospheric clouds ( although there have been observations of ozone loss attributed to volcanic aerosols ) . |
| 2 | Fletcher ( 1990 ) has argued for the extension of cervical screening after the age of 65 years but as yet there has been no similar argument for breast cancer screening . |
| 3 | But as yet it has not worked . |
| 4 | Some MOX fuel has been made — the lack of an economic rationale has never stopped the nuclear industry trying things — but as yet it has used up only 12.5 tonnes of plutonium . |
| 5 | But as yet it has not approved a timetable or set aside funds for construction . |