| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pron] [be] [v-ing] [prep] | 2444 |
|
| 2 | [is] what [pron] [be] [v-ing] | 855 |
|
| 3 | [is] [pron] [be] [v-ing] [prep] | 145 |
|
| 4 | [is] what [pron] [be] [prep] | 91 |
|
| 5 | [is] what [be] [v-ing] [prep] | 37 |
|
