| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know if i [was/were] [verb] | 6 |
|
| 2 | n't know if i [was/were] [verb] | 6 |
|
| 3 | not know if i was [verb] | 6 |
|
| 4 | not know if i [was/were] [v-ing] | 5 |
|
