| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [to-vb] [art] | 2159 |
|
| 2 | [v-ing] [to-vb] if [art] | 42 |
|
| 3 | [prep] [v-ing] if [art] | 34 |
|
| 4 | [prep] [v-ing] [to-vb] if | 18 |
|
