| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] [be] [v-ing] for | 265 |
|
| 2 | [indef pn] [Wh pn] [be] [v-ing] | 257 |
|
| 3 | [indef pn] [be] [v-ing] for | 87 |
|
