| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [prep] [pron] | 11415 |
|
| 2 | be [v-ing] [prep] [pron] | 11414 |
|
| 3 | was [verb] [prep] [pron] | 9644 |
|
| 4 | [was/were] [v-ing] [prep] [pron] | 5164 |
|
