| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] [art] | 9645 |
|
| 2 | [v-ing] [prep] [art] ground | 346 |
|
| 3 | [was/were] [prep] [art] ground | 47 |
|
| 4 | [was/were] [v-ing] [art] ground | 8 |
|
