| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has a [noun] | 462 |
|
| 2 | it has a [noun sg] | 435 |
|
| 3 | [pron] has a duty | 19 |
|
| 4 | it [verb] a duty | 15 |
|
| 5 | it [vb -s] a duty | 10 |
|
| 6 | it have a duty | 7 |
|
| 7 | it has [art] duty | 7 |
|
| 8 | it has a duty | 6 |
|
