| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] [prep] be [v-ing] | 731 |
|
| 2 | [adv] [vb past] [prep] be [v-ing] | 91 |
|
| 3 | [adv] happened [prep] be [verb] | 14 |
|
| 4 | [adv] happen [prep] be [v-ing] | 14 |
|
| 5 | [adv] happened [prep] [be] [v-ing] | 9 |
|
