| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] have [be] about | 7 |
|
| 2 | it [vb mod] have [be] about | 7 |
|
| 3 | it must have [be] about | 5 |
|
| 4 | it must have [be] about | 5 |
|
| 5 | it have [be] [verb] about | 9 |
|
| 6 | it have [be] [vb pp] about | 9 |
|
