| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] have [be] [prep] | 414 |
|
| 2 | must have [be] [prep] | 294 |
|
| 3 | must [adv] have [be] | 176 |
|
| 4 | must [adv] [be] [prep] | 118 |
|
