| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been due to the | 17 |
|
| 2 | [modal v] have been due to the | 17 |
|
| 3 | [noun] have been due to the | 12 |
|
| 4 | may have been due to the | 9 |
|
| 5 | may have been due to the | 9 |
|
| 6 | [noun sg] have been due to the | 7 |
|
| 7 | [adj] have been due to the | 5 |
|
| 8 | [noun pl] have been due to the | 5 |
|
| 9 | have been [adv] due to the | 7 |
|
| 10 | have been [adv] due to the | 7 |
|
| 11 | have been [verb] due to the | 5 |
|
| 12 | have been due to the [noun] | 31 |
|
| 13 | have been due to the [noun sg] | 26 |
|
