| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been responsible for | 48 |
|
| 2 | have been possible for | 26 |
|
| 3 | have been easy for | 24 |
|
| 4 | have been difficult for | 21 |
|
| 5 | have been impossible for | 13 |
|
| 6 | have been necessary for | 12 |
|
| 7 | have been good for | 11 |
|
| 8 | have been eligible for | 8 |
|
| 9 | have been hard for | 6 |
|
| 10 | have been terrible for | 5 |
|
