| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have [vb pp] a [adj] [noun] | 41 |
|
| 2 | should [vb infin] [vb pp] a [adj] [noun sg] | 40 |
|
| 3 | should [vb infin] had a [adj] [noun] | 9 |
|
| 4 | should [vb infin] [vb pp] a long [noun] | 5 |
|
