| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] [v-ing] [prep] | 1064 |
|
| 2 | [been] [v-ing] [prep] this | 154 |
|
| 3 | has [been] [prep] this | 22 |
|
| 4 | has [been] [v-ing] this | 21 |
|
