| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] on [art] | 1413 |
|
| 2 | have been [v-ing] on [art] | 228 |
|
| 3 | have been concentrate on [art] | 16 |
|
| 4 | have [be] concentrating on [art] | 6 |
|
| 5 | have been concentrating on [art] | 6 |
|
| 6 | [verb] been concentrating on [art] | 6 |
|
| 7 | have be concentrating on [art] | 6 |
|
| 8 | have been concentrating [prep] [art] | 6 |
|
| 9 | have [been] concentrating on [art] | 6 |
|
