| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] be our duty | 33 |
|
| 2 | it be our duty | 32 |
|
| 3 | it be our duty | 32 |
|
| 4 | [pers pn] be our duty | 32 |
|
| 5 | be our [adj] duty | 8 |
|
| 6 | be our [adj] duty | 7 |
|
| 7 | be our duty [to-vb] | 18 |
|
| 8 | be our duty [verb] | 18 |
|
