| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [be] [vb pp] a [noun sg] | 64 |
|
| 2 | [noun pl] should [be] [vb pp] [noun sg] | 42 |
|
| 3 | [noun pl] should [be] a [noun sg] | 23 |
|
| 4 | [noun pl] should [be] [vb pp] a | 21 |
|
