| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [prep] a | 13313 |
|
| 2 | usually [vb -s] [prep] | 363 |
|
| 3 | usually [prep] a | 214 |
|
| 4 | usually [vb -s] a | 106 |
|
