| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [v-ing] to [be] | 142 |
|
| 2 | it is [v-ing] to [be] | 102 |
|
| 3 | it is [adv] to [be] | 58 |
|
| 4 | it is [adv] [v-ing] to | 34 |
|
