| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] have a [noun sg] | 1099 |
|
| 2 | useful [verb] a [noun sg] | 37 |
|
| 3 | useful have [art] [noun sg] | 23 |
|
| 4 | useful have [art] [noun sg] | 23 |
|
| 5 | useful have a [noun sg] | 22 |
|
| 6 | useful have a [noun] | 20 |
|
