| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once upon a time [ex0] be | 17 |
|
| 2 | once upon a time [ex0] [be] | 17 |
|
| 3 | once upon a time [ex0] [was/were] | 17 |
|
| 4 | once upon a time [ex0] was | 14 |
|
