| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] be [v-ing] [prep] | 443 |
|
| 2 | [modal v] be [v-ing] [prep] [noun prp] | 353 |
|
| 3 | [modal v] [adv] be [prep] [noun prp] | 68 |
|
| 4 | [adv] be [v-ing] [prep] [noun prp] | 43 |
|
| 5 | [modal v] [adv] be [v-ing] [noun prp] | 18 |
|
