| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 71140 |
|
| 2 | be [v-ing] for | 10597 |
|
| 3 | [v-ing] for [prep] | 199 |
|
| 4 | be for [prep] | 27 |
|
