| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] be in | 38 |
|
| 2 | should [vb infin] be in | 38 |
|
| 3 | should have be in | 37 |
|
| 4 | should [vb infin] been in | 37 |
|
