| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] to | 14229 |
|
| 2 | [vb past] [be] [v-ing] | 7136 |
|
| 3 | [vb past] [v-ing] to | 620 |
|
| 4 | [vb past] [be] to | 452 |
|
