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