| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb mod] to | 510 |
|
| 2 | i used to | 386 |
|
| 3 | i ought to | 99 |
|
| 4 | i could to | 7 |
|
| 5 | i can to | 7 |
|
