| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i could [verb] | 8177 |
|
| 2 | i could [vb infin] | 8145 |
|
| 3 | i [modal v] understand | 345 |
|
| 4 | [pron] could understand | 167 |
|
| 5 | [pers pn] could understand | 141 |
|
| 6 | i could understand | 58 |
|
| 7 | i could understand | 58 |
|
