| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it must have be [noun] | 6 |
|
| 2 | [adv] it must have been [noun] | 6 |
|
| 3 | [adv] it must have be [noun] | 6 |
|
| 4 | [adv] it must have be [noun] | 5 |
|
