| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [vb pp] to [v-ing] | 252 |
|
| 2 | [Wh pn] [is] [vb pp] to | 114 |
|
| 3 | [Wh pn] [is] [vb pp] [v-ing] | 11 |
|
