| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [be] [v-ing] a [noun sg] | 2014 |
|
| 2 | [noun] [be] a tough [noun sg] | 24 |
|
| 3 | [be] [v-ing] a tough [noun sg] | 14 |
|
| 4 | [noun] [be] [v-ing] a tough | 9 |
|
