| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [adv] [adj] for | 22 |
|
| 2 | must have been [adv] [adj] for | 22 |
|
| 3 | must have been very [adj] [prep] | 20 |
|
| 4 | [modal v] have been very [adj] for | 15 |
|
| 5 | must have been very [adj] for | 6 |
|
| 6 | must have [be] very [adj] for | 6 |
|
| 7 | must have be very [adj] for | 6 |
|
| 8 | must have [been] very [adj] for | 6 |
|
| 9 | must have been very [adj] for | 6 |
|
| 10 | must [vb infin] been very [adj] for | 6 |
|
| 11 | must have been very [adj] for | 6 |
|
| 12 | must [verb] been very [adj] for | 6 |
|
