| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] [prep] | 7289 |
|
| 2 | could be [vb pp] [prep] | 7113 |
|
| 3 | [modal v] be restricted [prep] | 130 |
|
| 4 | could [be] restricted [prep] | 5 |
|
| 5 | could be restricted [prep] | 5 |
|
| 6 | could be restrict [prep] | 5 |
|
| 7 | could [be] restricted [prep] | 5 |
|
| 8 | could be restricted [prep] | 5 |
|
