| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been the [noun sg] [prep] | 1969 |
|
| 2 | have been studying the [noun sg] | 14 |
|
| 3 | have been studying [noun sg] [prep] | 7 |
|
| 4 | been studying the [noun sg] [prep] | 7 |
|
