| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has a [adj] duty | 21 |
|
| 2 | [noun sg] has a [adj] duty | 19 |
|
| 3 | has a [adj] duty [verb] | 21 |
|
| 4 | has a [adj] duty [to-vb] | 21 |
|
