| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] must be a [noun sg] | 100 |
|
| 2 | [noun sg] must be [vb pp] a | 29 |
|
| 3 | must be [vb pp] a [noun sg] | 26 |
|
| 4 | [noun sg] be [vb pp] a [noun sg] | 12 |
|
| 5 | [noun sg] must be [vb pp] [noun sg] | 9 |
|
