| Nominative | cvrček |
| Genitive | cvrčka |
| Dative | cvrčkovi; cvrčku |
| Accusative | cvrčka |
| Vocative | cvrčku |
| Locative | cvrčkovi; cvrčku |
| Instrumental | cvrčkem |
| Nominative | cvrčci |
| Genitive | cvrčků |
| Dative | cvrčkům |
| Accusative | cvrčky |
| Vocative | cvrčci |
| Locative | cvrčcích |
| Instrumental | cvrčky |