| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have been [v-ing] [adv] [prep] | 14 |
|
| 2 | they have been [v-ing] [adv] for | 9 |
|
| 3 | they have been [v-ing] [adv prt] [prep] | 7 |
|
