| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] [vb infin] [be] | 5118 |
|
| 2 | [vb mod] [not/n't] [verb] [be] | 2457 |
|
| 3 | [modal v] [not/n't] [vb infin] [be] | 2444 |
|
