| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [adv] be [vb pp] | 3102 |
|
| 2 | [v-ing] [modal v] [adv] be [vb pp] | 60 |
|
| 3 | [v-ing] it [modal v] [adv] be | 35 |
|
| 4 | [v-ing] it [modal v] be [vb pp] | 21 |
|
