| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] | 7113 |
|
| 2 | they could be [vb pp] | 474 |
|
| 3 | they be [vb pp] [prep] | 68 |
|
| 4 | they could be [prep] | 49 |
|
