| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [was/were] [be] [verb] | 188 |
|
| 2 | while it [be] [verb] | 116 |
|
| 3 | while it [was/were] [verb] | 44 |
|
| 4 | while it [was/were] [be] | 8 |
|
