| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] on a [noun] | 392 |
|
| 2 | should be [vb pp] on [noun] | 115 |
|
| 3 | should be [vb pp] on a | 88 |
|
| 4 | should be [vb pp] a [noun] | 66 |
|
| 5 | should be on a [noun] | 11 |
|
