| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [not/n't] have to [be] | 90 |
|
| 2 | [vb past] [not/n't] have to [be] | 90 |
|
| 3 | [vb past] [not/n't] have to be | 90 |
|
| 4 | [vb past] [not/n't] have to be | 90 |
|
| 5 | [vb past] [not/n't] have to [be] | 87 |
|
| 6 | did [not/n't] have to [be] | 87 |
|
| 7 | [vb past] n't have to [be] | 51 |
|
| 8 | [vb past] not have to [be] | 39 |
|
