| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be [verb] [art] tough | 10 |
|
| 2 | [noun] [be] [verb] a tough | 10 |
|
| 3 | [noun] [be] [verb] [art] tough | 10 |
|
| 4 | [noun] [be] [verb] a tough | 10 |
|
| 5 | [noun] [be] [v-ing] [art] tough | 9 |
|
| 6 | [noun] [be] have [art] tough | 8 |
|
| 7 | [noun] [be] having [art] tough | 8 |
|
