| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what they [vb base] [been] [v-ing] [prep] | 6 |
|
| 2 | what they [vb base] [been] [v-ing] [prep] | 6 |
|
| 3 | what they [vb base] been [v-ing] [prep] | 6 |
|
