| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have be at [noun sg] | 8 |
|
| 2 | should [vb infin] be at [noun sg] | 8 |
|
| 3 | should [verb] been at [noun sg] | 8 |
|
| 4 | should have be at [noun sg] | 8 |
|
