| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [adv prt] at the | 174 |
|
| 2 | [be] [v-ing] at the time | 85 |
|
| 3 | [be] [adv prt] at the time | 26 |
|
| 4 | [v-ing] [adv prt] at the time | 24 |
|
