| Simplified | 苦于 |
| Traditional | 苦於 |
| Pinyin | ku3 |
| Pinyin | kǔ |
| Verb | 苦于 |
| Continuous aspect | 苦于 着 |
| Completive aspect | 苦于 了 |
| Past aspect | 苦于 过 |
| Verb | ku3 |
| Continuous aspect | ku3 zhe5 |
| Completive aspect | ku3 le5 |
| Past aspect | ku3 guo4 |
| Verb | kǔ |
| Continuous aspect | kǔ zhe |
| Completive aspect | kǔ le |
| Past aspect | kǔ guò |