| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [adv] [prep] | 4736 |
|
| 2 | [was/were] [verb] [adv] of | 1331 |
|
| 3 | [be] [v-ing] [adv] of | 909 |
|
