| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] at the time | 384 |
|
| 2 | be [v-ing] at the time | 85 |
|
| 3 | be happening at the [noun] | 40 |
|
| 4 | be happening at [art] time | 10 |
|
| 5 | be happening [prep] the time | 7 |
|
| 6 | be happen at the time | 7 |
|
| 7 | be happening [prep] the time | 7 |
|
| 8 | be happening at the time | 7 |
|
| 9 | [be] happening at the time | 7 |
|
