| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [prep] [v-ing] back [prep] time | 8 |
|
| 2 | be [prep] [v-ing] back [prep] time | 8 |
|
| 3 | was [prep] [v-ing] back [prep] time | 6 |
|
| 4 | [was/were] [prep] [v-ing] back [prep] time | 6 |
|
