| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [v-ing] [adv prt] | 1378 |
|
| 2 | it [verb] [been] [v-ing] | 414 |
|
| 3 | it [verb] [v-ing] [adv prt] | 138 |
|
| 4 | it [verb] [been] [adv prt] | 70 |
|
| 5 | it [been] [v-ing] [adv prt] | 6 |
|
