| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [vb pp] a | 349 |
|
| 2 | i must [vb infin] [vb pp] | 316 |
|
| 3 | i must [vb infin] a | 100 |
|
| 4 | i [vb infin] [vb pp] a | 16 |
|
