| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] by an | 2306 |
|
| 2 | [be] [v-ing] [prep] an | 1000 |
|
| 3 | [be] [v-ing] by [art] | 280 |
|
| 4 | [be] [v-ing] by [art] | 280 |
|
| 5 | [be] [v-ing] by a | 40 |
|
