| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [modal v] be | 522 |
|
| 2 | [v-ing] [vb mod] be | 522 |
|
| 3 | [verb] may be | 481 |
|
| 4 | [v-ing] may be | 74 |
|
| 5 | [v-ing] may [be] | 74 |
|
| 6 | [v-ing] may be | 74 |
|
| 7 | [v-ing] may [be] | 74 |
|
