| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [noun sg] [noun] must be [vb pp] | 80 |
|
| 2 | [noun sg] [noun sg] [noun] must be [verb] | 70 |
|
| 3 | [noun] [noun sg] [noun sg] must be [verb] | 53 |
|
| 4 | [noun] [noun sg] [noun pl] must be [verb] | 29 |
|
| 5 | [noun prp] [noun sg] [noun] must be [verb] | 12 |
|
| 6 | [noun] [noun sg] [noun] must be used | 5 |
|
| 7 | [noun] [noun sg] system must be [verb] | 5 |
|
| 8 | [noun] [noun sg] [noun] must be use | 5 |
|
