| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] at [art] | 118 |
|
| 2 | should [prep] [art] | 60 |
|
| 3 | should [prep] [art] | 60 |
|
| 4 | should at [art] | 10 |
|
| 5 | should at [art] | 10 |
|
