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