| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] for | 568 |
|
| 2 | should [verb] for | 568 |
|
| 3 | [modal v] ask for | 241 |
|
| 4 | should ask [prep] | 33 |
|
| 5 | should ask for | 26 |
|
