Usage Examples Present Perfect

• I've discovered this amazing thing. -
• I haven't done this work. -
• I've never seen snow. -
• I have taught you. -
• It has been a hard task. -
• Have you seen the roof? -
• You've stolen them. -
• He hasn't finished the report yet. -
• You haven't eaten a bite. -
• Have they released you? -
• We've learned some shocking news. -
• I've never seen the desert. -
• He hasn't been home for two days. -
• I've never built a robot. -
• We have fired too many. -
• He hasn't known me long. -
• You've lost me. -
• We haven't met yet. -
• Have you ever been to Australia? -
• She's made an effort. -