| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must [vb infin] [verb] [det] | 18 |
|
| 2 | they must [vb infin] [vb pp] [det] | 17 |
|
| 3 | they must have [verb] [det] | 15 |
|
| 4 | they must [vb infin] do [det] | 5 |
|
| 5 | they must [vb infin] done [det] | 5 |
|
