| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] only [be] understood | 56 |
|
| 2 | [vb mod] only [be] understand | 56 |
|
| 3 | [vb mod] only be understand | 56 |
|
| 4 | can only [be] understand | 46 |
|
| 5 | could only [be] understand | 8 |
|
