| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have to [be] | 2899 |
|
| 2 | [vb mod] have [be] [v-ing] | 1003 |
|
| 3 | [vb mod] to [be] [v-ing] | 252 |
|
| 4 | have to [be] [v-ing] | 119 |
|
