| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] to | 62721 |
|
| 2 | be [v-ing] to | 14228 |
|
| 3 | be [vb pp] [v-ing] | 5197 |
|
| 4 | [vb pp] [v-ing] to | 1271 |
|
