| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [noun sg] | 41586 |
|
| 2 | is a [noun sg] | 33923 |
|
| 3 | is [v-ing] a | 2653 |
|
| 4 | is [v-ing] [noun sg] | 1743 |
|
