| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [prep] [v-ing] [prep] | 529 |
|
| 2 | [prep] [v-ing] [prep] be | 307 |
|
| 3 | [vb infin] [v-ing] [prep] be | 11 |
|
