| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been a [adj] [noun] | 757 |
|
| 2 | have been a [adj] factor | 63 |
|
| 3 | [verb] been a [adj] factor | 63 |
|
| 4 | have been [art] [adj] factor | 17 |
|
| 5 | have been [art] [adj] factor | 17 |
|
| 6 | have been a [adj] factor | 14 |
|
| 7 | have be a [adj] factor | 12 |
|
| 8 | have [been] a [adj] factor | 12 |
|
| 9 | [vb infin] been a [adj] factor | 12 |
|
| 10 | have [be] a [adj] factor | 12 |
|
