| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] involves [verb] a [noun sg] | 12 |
|
| 2 | [det] involves [v-ing] a [noun] | 12 |
|
| 3 | this involves [verb] a [noun] | 11 |
|
| 4 | [det] involves [verb] a [noun] | 10 |
|
