| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] an | 2000 |
|
| 2 | [be] [v-ing] by | 661 |
|
| 3 | [v-ing] by an | 30 |
|
| 4 | [be] by an | 20 |
|
