| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must have [verb] at [adv] | 13 |
|
| 2 | [pron] must have [vb pp] at [adv] | 13 |
|
| 3 | [pron] must have been at [adv] | 12 |
|
| 4 | [pron] must have [be] at [adv] | 12 |
|
| 5 | [pron] must have [been] at [adv] | 12 |
|
| 6 | [pron] must have be at [adv] | 12 |
|
| 7 | [pron] must have at [adv] [num] | 8 |
|
| 8 | [pron] must have at [adv] [adj] | 8 |
|
