| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [v-ing] [to-vb] a | 516 |
|
| 2 | [v-ing] [to-vb] a long | 19 |
|
| 3 | [is] [v-ing] a long | 18 |
|
| 4 | [is] [to-vb] a long | 6 |
|
