| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | hard to think [prep] [adj] | 19 |
|
| 2 | hard to think of [adj] | 18 |
|
| 3 | hard to think [prep] [det] | 15 |
|
| 4 | hard to think [prep] any | 9 |
|
| 5 | hard to think [prep] any | 9 |
|
