| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [vb pp] [adv prt] [prep] | 179 |
|
| 2 | must have been [vb pp] [adv] [prep] | 41 |
|
| 3 | must have been [verb] [adv prt] [prep] | 36 |
|
| 4 | must have [been] [vb pp] [adv prt] [prep] | 27 |
|
| 5 | must have been [vb pp] [adv prt] [prep] | 27 |
|
| 6 | must [vb infin] been [vb pp] [adv prt] [prep] | 27 |
|
| 7 | must have [be] [vb pp] [adv prt] [prep] | 27 |
|
| 8 | must have be [vb pp] [adv prt] [prep] | 27 |
|
| 9 | must [verb] been [vb pp] [adv prt] [prep] | 27 |
|
