| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] by | 1297 |
|
| 2 | be [vb pp] [adv prt] by | 1215 |
|
| 3 | could be [vb pp] [adv prt] | 756 |
|
| 4 | could be [adv prt] by | 6 |
|
