| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [art] [adj] | 17250 |
|
| 2 | must be [vb pp] [prep] [art] | 2033 |
|
| 3 | must be [vb pp] [prep] [adj] | 971 |
|
| 4 | must be [prep] [art] [adj] | 109 |
|
| 5 | must be [vb pp] [art] [adj] | 71 |
|
