| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have [be] [prep] | 180 |
|
| 2 | what [pron] have [be] [prep] | 66 |
|
| 3 | what [pron] must [be] [prep] | 26 |
|
| 4 | what [pron] must have [be] | 18 |
|
