| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] whether [pron] has be | 6 |
|
| 2 | [v-ing] whether [pron] has [be] | 6 |
|
| 3 | [v-ing] whether [pron] has [been] | 6 |
|
| 4 | [v-ing] whether [pron] has been | 6 |
|
