| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb infin] a [adj] | 960 |
|
| 2 | [verb] [vb infin] a [adj] | 840 |
|
| 3 | [verb] [verb] a useful | 65 |
|
| 4 | [verb] [vb infin] [art] useful | 14 |
|
| 5 | [verb] [vb infin] [art] useful | 14 |
|
| 6 | [verb] [vb infin] a useful | 13 |
|
| 7 | [verb] [vb infin] a useful | 13 |
|
