| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been using the | 12 |
|
| 2 | have been discussing the | 12 |
|
| 3 | have been studying the | 9 |
|
| 4 | have been doing the | 9 |
|
| 5 | have been investigating the | 7 |
|
| 6 | have been considering the | 6 |
|
| 7 | have been following the | 5 |
|
| 8 | have been monitoring the | 5 |
|
