| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be [vb pp] for the operation | 8 |
|
| 2 | [prep] be [vb pp] for [art] operation | 8 |
|
| 3 | [prep] be used for [art] operation | 8 |
|
| 4 | [prep] be [vb pp] for [art] operation | 8 |
|
| 5 | [prep] be [vb pp] for [art] operation | 8 |
|
| 6 | to be [vb pp] for [art] operation | 8 |
|
| 7 | to be [vb pp] for [art] operation | 8 |
|
