| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] kept [art] | 8 |
|
| 2 | should have kept [art] | 8 |
|
| 3 | should [vb infin] kept [art] | 8 |
|
| 4 | should [vb infin] kept the | 6 |
|
| 5 | should [vb infin] kept the | 6 |
|
