| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i 've been [v-ing] on | 33 |
|
| 2 | i 've been work on | 16 |
|
| 3 | i 've been working on | 16 |
|
| 4 | i 've been concentrate on | 6 |
|
| 5 | i 've been concentrating on | 6 |
|
