| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used to do [art] | 97 |
|
| 2 | [vb mod] to do the | 57 |
|
| 3 | [vb mod] to do a | 43 |
|
| 4 | ought to do [art] | 7 |
|
| 5 | [vb mod] to do an | 7 |
|
