| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] be [noun sg] | 16 |
|
| 2 | should have be [noun sg] | 14 |
|
| 3 | should [verb] been [noun sg] | 14 |
|
| 4 | should have be [noun sg] | 14 |
|
