| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [was/were] [prep] [v-ing] | 559 |
|
| 2 | [pron] it [was/were] [prep] | 389 |
|
| 3 | it [was/were] [prep] [v-ing] | 383 |
|
| 4 | [pron] it [was/were] [v-ing] | 77 |
|
