| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] only [be] undertaken | 22 |
|
| 2 | [vb mod] only be undertaken | 22 |
|
| 3 | [vb mod] only be undertaken | 22 |
|
| 4 | [vb mod] only [be] undertaken | 22 |
|
| 5 | should only [be] undertaken | 10 |
|
| 6 | can only [be] undertaken | 10 |
|
