1. This conference focused on **discuss** local and regional issues.
   - Correction: This conference focused on **discussing** local and regional issues.

2. **Organise** the ASEAN workshop was harder than I expected.
   - Correction: **Organizing** the ASEAN workshop was harder than I expected.

3. His job involves **to translate** documents about ASEAN events.
   - Correction: His job involves **translating** documents about ASEAN events.

4. I am thinking of **participate** in a youth competition.
   - Correction: I am thinking of **participating** in a youth competition.