| for them | 8 | transitive-object |
| very | 5 | degree |
| sometimes | 5 | temporal |
| lesson → be → difficult | 32 |
| lesson → be → hard | 21 |
| lesson → be → tough | 4 |
| negative | neutral | positive |
| 0.470 | 0.380 | 0.150 |
| Raw frequency | 57 |
| Normalized frequency | 0.597 |
| Modifier score | 0.456 |
| Perplexity | 113.654 |