| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [am/are] [verb] | 2855 |
|
| 2 | who [am/are] [v-ing] | 1544 |
|
| 3 | [pron] [am/are] buying | 221 |
|
| 4 | who [be] buying | 26 |
|
| 5 | who [am/are] buy | 10 |
|
