| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [modal v] only be [verb] | 174 |
|
| 2 | which may [adv] be [verb] | 121 |
|
| 3 | [pron] may only be [verb] | 16 |
|
| 4 | which may only [be] [verb] | 9 |
|
| 5 | [Wh det] may only be [verb] | 9 |
|
| 6 | which may only be [verb] | 9 |
|
