| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have a [adj] duty [to-vb] | 16 |
|
| 2 | [noun pl] have a [adj] duty [to-vb] | 11 |
|
| 3 | [pers pn] have a [adj] duty [to-vb] | 6 |
|
| 4 | [pron] have a [adj] duty [to-vb] | 6 |
|
| 5 | authority have a [adj] duty [to-vb] | 5 |
|
| 6 | authorities have a [adj] duty [to-vb] | 5 |
|
| 7 | have a [adj] duty [to-vb] [adj] | 6 |
|
| 8 | have a [adj] duty [to-vb] [art] | 5 |
|
| 9 | have a [adj] duty [to-vb] [art] | 5 |
|
