| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [v-ing] an [noun sg] | 68 |
|
| 2 | i [modal v] be [v-ing] [noun sg] | 37 |
|
| 3 | i [modal v] be an [noun sg] | 12 |
|
| 4 | i [modal v] be [v-ing] an | 8 |
|
