| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] be [v-ing] for | 1594 |
|
| 2 | be [v-ing] for an | 244 |
|
| 3 | [verb] be [v-ing] an | 141 |
|
| 4 | [verb] [v-ing] for an | 24 |
|
