| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [prep] first | 20 |
|
| 2 | be [v-ing] [prep] first | 20 |
|
| 3 | [be] [v-ing] at first | 13 |
|
| 4 | [be] [v-ing] at first | 13 |
|
| 5 | [was/were] [v-ing] [prep] first | 9 |
|
| 6 | was [v-ing] [prep] first | 9 |
|
