| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] be [verb] down | 12 |
|
| 2 | should [vb infin] be [verb] down | 12 |
|
| 3 | should [verb] be [vb pp] down | 9 |
|
| 4 | should have be [verb] down | 9 |
|
| 5 | should have be [verb] down | 9 |
|
| 6 | should [verb] been [verb] down | 9 |
|
