| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun pl] [modal v] be [v-ing] | 165 |
|
| 2 | [noun sg] [modal v] be [v-ing] at | 64 |
|
| 3 | [noun pl] [modal v] be [v-ing] at | 38 |
|
| 4 | [noun sg] [noun pl] [modal v] be at | 28 |
|
