| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] research have been do [prep] | 16 |
|
| 2 | [adj] research have be done [prep] | 16 |
|
| 3 | [adj] research has be do [prep] | 13 |
|
| 4 | [det] research have be do [prep] | 10 |
|
| 5 | [adj] research have be do on | 9 |
|
| 6 | little research have be do [prep] | 8 |
|
| 7 | little research have be do [prep] | 8 |
|
| 8 | [adj] research have be do [prep] | 6 |
|
