| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | open up the [noun sg] of [v-ing] | 17 |
|
| 2 | open up the [noun sg] of [verb] | 17 |
|
| 3 | opens up the [noun sg] of [verb] | 11 |
|
| 4 | open up the possibility of [verb] | 10 |
|
