| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they be [v-ing] [prep] | 4180 |
|
| 2 | be [v-ing] [prep] an | 1000 |
|
| 3 | they be [v-ing] an | 76 |
|
| 4 | they be [prep] an | 48 |
|
