| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had a [adj] [noun] [to-vb] | 277 |
|
| 2 | [verb] a [adj] obligation [to-vb] | 48 |
|
| 3 | have a [adj] obligation [to-vb] | 40 |
|
| 4 | [vb past] a [adj] obligation [to-vb] | 12 |
|
| 5 | had [art] [adj] obligation [to-vb] | 11 |
|
| 6 | had [art] [adj] obligation [to-vb] | 11 |
|
| 7 | had a [adj] obligation [to-vb] | 9 |
|
| 8 | had a [adj] obligation [verb] | 9 |
|
