| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [not/n't] [vb infin] [been] | 333 |
|
| 2 | it [vb mod] [not/n't] [vb infin] been | 333 |
|
| 3 | it [vb mod] [not/n't] have [been] | 332 |
|
| 4 | it [vb mod] not [vb infin] [been] | 189 |
|
| 5 | it [vb mod] n't [vb infin] [been] | 144 |
|
| 6 | it would [not/n't] [vb infin] [been] | 131 |
|
| 7 | it could [not/n't] [vb infin] [been] | 88 |
|
| 8 | it can [not/n't] [vb infin] [been] | 24 |
|
| 9 | it might [not/n't] [vb infin] [been] | 24 |
|
| 10 | it ca [not/n't] [vb infin] [been] | 23 |
|
| 11 | it may [not/n't] [vb infin] [been] | 22 |
|
| 12 | it should [not/n't] [vb infin] [been] | 12 |
|
| 13 | it need [not/n't] [vb infin] [been] | 7 |
|
