Example sentences of "theories have be put " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | Theories have been put forward that it had anything from 6 to 24 sides , and even that it may have been circular . |
| 2 | Many theories have been put forward over the years as to its original purpose . |
| 3 | Various fairly unscientific theories have been put forward over the years as to why and how it got there . |
| 4 | Many theories have been put forward as to the origin of AIDS but there is no scientific agreement . |
| 5 | Various theories have been put forward to explain this . |
| 6 | A number of theories have been put forward to explain this difference in smoking rates . |
| 7 | ‘ No one knows for certain , although plenty of theories have been put forward . |