| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [adv] to [v-ing] | 8 |
|
| 2 | [vb mod] be [vb pp] [adv] to [verb] | 8 |
|
| 3 | [modal v] be [vb pp] [adv prt] to [verb] | 5 |
|
