| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] | 79523 |
|
| 2 | be [adv] [prep] | 59723 |
|
| 3 | be [adv] [v-ing] | 52226 |
|
| 4 | [adv] [v-ing] [prep] | 26356 |
|
