| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be [vb pp] for a | 171 |
|
| 2 | [v-ing] to be [vb pp] for | 50 |
|
| 3 | [v-ing] to be [vb pp] a | 27 |
|
| 4 | [v-ing] be [vb pp] for a | 7 |
|
