| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [verb] [prep] | 23523 |
|
| 2 | [vb pp] [to-vb] [prep] | 17262 |
|
| 3 | [verb] to operate [prep] | 281 |
|
| 4 | [vb pp] operate [prep] | 131 |
|
| 5 | [vb pp] to operate [prep] | 123 |
|
