| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i [vb mod] not understand | 99 |
|
| 2 | i [modal v] not understand | 99 |
|
| 3 | i [modal v] not understand | 99 |
|
| 4 | i can not understand | 60 |
|
| 5 | i can not understand | 60 |
|
| 6 | i could not understand | 39 |
|
| 7 | i could not understand | 39 |
|
