| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [adj] | 1071 |
|
| 2 | must [vb infin] [adj] | 1071 |
|
| 3 | [modal v] keep [adj] | 91 |
|
| 4 | [vb mod] keep [adj] | 91 |
|
| 5 | must keep [adj] | 27 |
|
| 6 | must keep [adj] | 18 |
|
| 7 | must keep [adj] | 18 |
|
