| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | while i have been [v-ing] | 12 |
|
| 2 | while i have be [v-ing] | 12 |
|
| 3 | while i have [been] [v-ing] | 12 |
|
| 4 | while i 've [be] [v-ing] | 8 |
|
