| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can [adv] be explained by | 26 |
|
| 2 | can only be explained [prep] | 14 |
|
| 3 | can [adv] be explained in | 12 |
|
| 4 | can partly be explained [prep] | 5 |
|
