| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be a [adv] tougher | 12 |
|
| 2 | be a [adv] tougher | 12 |
|
| 3 | be a much tougher | 7 |
|
| 4 | be a much tougher | 7 |
|
| 5 | be a [noun] tougher | 7 |
|
| 6 | be a [noun sg] tougher | 7 |
|
| 7 | be a lot tougher | 5 |
|
| 8 | be a lot tougher | 5 |
|
| 9 | be a tougher [noun] | 10 |
|
| 10 | be a tougher [noun sg] | 10 |
|
