| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [modal v] have been [v-ing] | 84 |
|
| 2 | that they have been [v-ing] | 71 |
|
| 3 | that they [modal v] have been | 62 |
|
| 4 | that [modal v] have been [v-ing] | 9 |
|
