| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this may have be [prep] | 6 |
|
| 2 | this may have [be] [prep] | 6 |
|
| 3 | this may have been [prep] | 6 |
|
| 4 | this may have [been] [prep] | 6 |
|
