| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have be | 1857 |
|
| 2 | should have [be] | 1857 |
|
| 3 | should have [been] | 1852 |
|
| 4 | should have been | 1852 |
|
| 5 | should have [is] | 5 |
|
| 6 | should have is | 5 |
|
