| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] must be [vb pp] [adj] | 85 |
|
| 2 | [noun sg] must be made [adj] | 34 |
|
| 3 | [noun sg] must be make [adj] | 34 |
|
| 4 | [noun sg] must be kept [adj] | 19 |
|
| 5 | [noun sg] must be keep [adj] | 19 |
|
| 6 | [noun sg] must be [to-vb] [adj] | 9 |
|
| 7 | [noun sg] must be [verb] clear | 7 |
|
| 8 | [noun sg] must be [v-ing] [adj] | 6 |
|
| 9 | [noun sg] must be [verb] available | 6 |
|
| 10 | [noun sg] must be [verb] clean | 5 |
|
| 11 | [noun sg] must be [verb] aware | 5 |
|
