| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it have [been] [prep] | 285 |
|
| 2 | [conj] have [been] [v-ing] [prep] | 190 |
|
| 3 | it have [been] [v-ing] [prep] | 131 |
|
| 4 | [conj] it have [been] [v-ing] | 109 |
|
