| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adj] | 4588 |
|
| 2 | [modal v] be prepared | 576 |
|
| 3 | must [be] prepared | 122 |
|
| 4 | must be prepared | 122 |
|
| 5 | must [be] prepared | 122 |
|
