| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can be explained [prep] | 145 |
|
| 2 | can [not/n't] be [prep] | 118 |
|
| 3 | can [not/n't] be explained | 84 |
|
| 4 | [not/n't] be explained [prep] | 65 |
|
