| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] not have to be there | 5 |
|
| 2 | [verb] [not/n't] have to be there | 5 |
|
| 3 | [verb] [adv] have to be there | 5 |
|
| 4 | do [adv] have to be there | 5 |
|
| 5 | [verb] [adv] have to be there | 5 |
|
