| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] is by | 44 |
|
| 2 | [vb -s] is by | 9 |
|
| 3 | [to-vb] is by | 8 |
|
| 4 | [vb base] is by | 7 |
|
| 5 | [v-ing] is by | 7 |
|
| 6 | happen is by | 5 |
|
