| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have [be] a | 321 |
|
| 2 | [ex0] [modal v] have [be] a | 263 |
|
| 3 | [ex0] must have [be] [art] | 87 |
|
| 4 | [ex0] must [verb] [be] a | 85 |
|
