| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [be] explain [is] | 9 |
|
| 2 | to [be] explain [is] | 9 |
|
| 3 | [prep] [be] explain [is] | 9 |
|
| 4 | to [be] explain [is] | 9 |
|
