| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] be [v-ing] [prep] | 8759 |
|
| 2 | [modal v] be [v-ing] [prep] | 4042 |
|
| 3 | [noun sg] [modal v] be [prep] | 3937 |
|
| 4 | [noun sg] [modal v] be [v-ing] | 2167 |
|
