| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] to [be] [v-ing] | 1684 |
|
| 2 | to [be] [v-ing] at | 211 |
|
| 3 | [vb past] [be] [v-ing] at | 180 |
|
| 4 | [vb past] to [be] at | 104 |
|
| 5 | [vb past] to [v-ing] at | 12 |
|
