| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so it is [prep] [v-ing] | 12 |
|
| 2 | so it is [prep] [v-ing] | 12 |
|
| 3 | so it is [prep] [v-ing] | 12 |
|
| 4 | so it is worth [v-ing] | 12 |
|
| 5 | so it is worth [v-ing] | 12 |
|
