| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] could [adv] be explain | 10 |
|
| 2 | [noun sg] could [adv] be explain | 7 |
|
| 3 | could [adv] be explain [prep] | 13 |
|
| 4 | could [adv] be explain [prep] | 13 |
|
| 5 | could [adv] be explain by | 9 |
|
| 6 | could [adv] be explain by | 9 |
|
