| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] and should [be] [vb pp] | 57 |
|
| 2 | could [conj] should [be] [vb pp] | 28 |
|
| 3 | could [coord] should [be] [vb pp] | 28 |
|
| 4 | could and [modal v] [be] [vb pp] | 21 |
|
| 5 | could and should [be] [verb] | 21 |
|
| 6 | could and should [be] [vb pp] | 18 |
|
| 7 | could and should [be] [vb pp] | 18 |
|
