| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [v-ing] [prep] a | 234 |
|
| 2 | to be [v-ing] [prep] a | 234 |
|
| 3 | to be [verb] at a | 192 |
|
| 4 | to be [v-ing] at [art] | 66 |
|
| 5 | to be [v-ing] at [art] | 66 |
|
| 6 | to be [v-ing] at a | 18 |
|
| 7 | to be [v-ing] at a | 13 |
|
| 8 | [prep] be [v-ing] at a | 13 |
|
| 9 | to [be] [v-ing] at a | 13 |
|
