| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] [adj] [noun sg] | 1490 |
|
| 2 | must be [prep] [noun sg] | 182 |
|
| 3 | must be [adj] [noun sg] | 115 |
|
| 4 | must be [prep] [adj] | 89 |
|
