| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] [prep] [v-ing] [adv] | 456 |
|
| 2 | it be [vb pp] [prep] [adv] | 196 |
|
| 3 | it be [vb pp] [prep] [v-ing] | 154 |
|
| 4 | it be [prep] [v-ing] [adv] | 112 |
|
