| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [art] [noun sg] | 28883 |
|
| 2 | must be [vb pp] [prep] [art] | 2033 |
|
| 3 | must be [vb pp] [prep] [noun sg] | 790 |
|
| 4 | must be [prep] [art] [noun sg] | 223 |
|
| 5 | must be [vb pp] [art] [noun sg] | 71 |
|
