| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must have [been] [adv] [adj] | 70 |
|
| 2 | it must [verb] [been] [adv] [adj] | 70 |
|
| 3 | it must [verb] been [adv] [adj] | 70 |
|
| 4 | it must [vb infin] [been] [adv] [adj] | 70 |
|
| 5 | it must [verb] [been] [adv] [adj] | 69 |
|
| 6 | it must have [been] [adv] [adj] | 68 |
|
| 7 | it must [verb] [been] [adv] [adj] | 48 |
|
| 8 | it must [verb] [been] [adv] [num] | 16 |
|
| 9 | it must [verb] [been] very [adj] | 13 |
|
| 10 | it must [verb] [been] about [adj] | 13 |
|
| 11 | it must [verb] [been] very [adj] | 13 |
|
| 12 | it must [verb] [been] about [adj] | 13 |
|
| 13 | it must [verb] [been] pretty [adj] | 9 |
|
| 14 | it must [verb] [been] pretty [adj] | 9 |
|
| 15 | it must [verb] [been] [adv] [det] | 5 |
|
