| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | before have been [v-ing] | 8 |
|
| 2 | before have be [v-ing] | 8 |
|
| 3 | before had [be] [v-ing] | 8 |
|
| 4 | before have [been] [v-ing] | 8 |
|
| 5 | before have [be] [v-ing] | 8 |
|
