| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] be [adv] [art] [noun sg] | 6 |
|
| 2 | should [vb infin] been [adv] [art] [noun sg] | 5 |
|
| 3 | should have be [adv] [art] [noun sg] | 5 |
|
