| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] | 42450 |
|
| 2 | should [vb infin] | 42404 |
|
| 3 | [vb mod] use | 4456 |
|
| 4 | [modal v] use | 4456 |
|
| 5 | should use | 238 |
|
| 6 | should use | 238 |
|
