| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] [be] a [noun sg] | 381 |
|
| 2 | must [verb] [be] a [noun sg] | 177 |
|
| 3 | must [adv] [verb] a [noun sg] | 71 |
|
| 4 | must [adv] [be] a [noun sg] | 46 |
|
| 5 | must [adv] [verb] [be] a | 20 |
|
