| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] have a | 46 |
|
| 2 | should [verb] had a | 38 |
|
| 3 | should have have a | 38 |
|
| 4 | should have have a | 35 |
|
| 5 | should [verb] to have a | 8 |
|
