| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [prep] [adj] [noun sg] | 71 |
|
| 2 | it must [be] [prep] [noun sg] | 19 |
|
| 3 | it must [be] [adj] [noun sg] | 18 |
|
| 4 | it must [be] [prep] [adj] | 11 |
|
