| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [noun] at the | 140 |
|
| 2 | be [v-ing] at the time | 84 |
|
| 3 | [v-ing] [noun] at the time | 28 |
|
| 4 | be [noun] at the time | 20 |
|
