| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could only [verb] | 1356 |
|
| 2 | could [adv] do | 946 |
|
| 3 | could [adv] do | 285 |
|
| 4 | [vb mod] only do | 155 |
|
| 5 | [modal v] only do | 155 |
|
| 6 | could only do | 32 |
|
| 7 | could only do | 32 |
|
