| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must do something about | 11 |
|
| 2 | must do [indef pn] about | 11 |
|
| 3 | must do [pron] about | 11 |
|
| 4 | must do something about | 11 |
|
| 5 | must do [pron] about | 11 |
|
