| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must do | 454 |
|
| 2 | who must [verb] | 227 |
|
| 3 | who [modal v] do | 227 |
|
| 4 | who must [vb infin] | 227 |
|
| 5 | [Wh pn] must do | 5 |
|
| 6 | who must do | 5 |
|
| 7 | who must do | 5 |
|
