| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have [be] [prep] | 484 |
|
| 2 | must have [be] [prep] | 294 |
|
| 3 | they must have [be] | 132 |
|
| 4 | they must [be] [prep] | 52 |
|
