| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] have be [art] [noun sg] | 17 |
|
| 2 | must [adv] have been [art] [noun sg] | 17 |
|
| 3 | must [adv] have [been] [art] [noun sg] | 17 |
|
| 4 | must [adv] have [be] a [noun sg] | 9 |
|
| 5 | must [adv] have [be] the [noun sg] | 8 |
|
| 6 | must once have [be] [art] [noun sg] | 6 |
|
