| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [vb pp] [adv prt] [prep] | 3456 |
|
| 2 | could [be] [vb pp] [adv] [prep] | 791 |
|
| 3 | could [be] [verb] [adv prt] [prep] | 409 |
|
| 4 | could [be] [vb pp] [adv prt] [prep] | 388 |
|
| 5 | could [be] [vb pp] [adv prt] [prep] | 388 |
|
