| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be [v-ing] for | 590 |
|
| 2 | be [v-ing] for an | 244 |
|
| 3 | [vb past] be [v-ing] an | 52 |
|
| 4 | [vb past] [v-ing] for an | 8 |
|
