| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] [prep] a | 17977 |
|
| 2 | [was/were] [v-ing] [prep] [art] | 9645 |
|
| 3 | [was/were] [v-ing] [prep] [art] | 9645 |
|
| 4 | [be] [v-ing] [prep] a | 6861 |
|
| 5 | [was/were] [v-ing] [prep] a | 2920 |
|
| 6 | [was/were] [v-ing] [prep] a | 2557 |
|
