| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] be [v-ing] | 37508 |
|
| 2 | [noun sg] be a | 33811 |
|
| 3 | be [v-ing] a | 13939 |
|
| 4 | [noun sg] [v-ing] a | 6097 |
|
