| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [prep] [v-ing] [verb] | 200 |
|
| 2 | be [prep] [verb] [to-vb] | 174 |
|
| 3 | [be] [prep] [v-ing] [to-vb] | 165 |
|
| 4 | be [prep] [v-ing] [to-vb] | 165 |
|
