| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] research has be do [prep] | 10 |
|
| 2 | [det] research have be done [prep] | 10 |
|
| 3 | [det] research have been do [prep] | 10 |
|
| 4 | little research have be do [prep] | 8 |
|
