| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] a [adj] factor | 78 |
|
| 2 | have been a [adj] factor | 78 |
|
| 3 | have be a [adj] factor | 78 |
|
| 4 | have [be] a [adj] factor | 63 |
|
| 5 | has [be] a [adj] factor | 35 |
|
| 6 | have [be] a major factor | 23 |
|
| 7 | have [be] an [adj] factor | 15 |
|
| 8 | have [be] a [adj] factor | 14 |
|
| 9 | had [be] a [adj] factor | 13 |
|
| 10 | have [be] a important factor | 10 |
|
| 11 | to have [be] a [adj] factor | 10 |
|
| 12 | have [be] a key factor | 8 |
|
| 13 | have [be] a contributory factor | 8 |
|
