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