| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] [prep] | 18606 |
|
| 2 | it was [prep] | 8851 |
|
| 3 | it was [v-ing] | 3229 |
|
| 4 | it [v-ing] [prep] | 589 |
|
