| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] for [adj] [noun] | 83 |
|
| 2 | could [be] [vb pp] for [adj] [noun pl] | 52 |
|
| 3 | [modal v] [be] [vb pp] for [adj] purposes | 30 |
|
| 4 | could [be] [vb pp] for [adj] purpose | 12 |
|
| 5 | could [be] [vb pp] [prep] [adj] purposes | 9 |
|
| 6 | could [be] [vb pp] [prep] [adj] purposes | 9 |
|
| 7 | could [be] [vb pp] for [adj] purposes | 8 |
|
| 8 | could [be] [verb] for [adj] purposes | 8 |
|
