| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be [adv] [verb] [v-ing] to | 6 |
|
| 2 | [modal v] be [adv] [verb] [v-ing] to | 6 |
|
| 3 | [modal v] be [adv] [vb pp] [v-ing] to | 6 |
|
| 4 | [modal v] be [adv] [verb] according to | 5 |
|
