Basic VS Advanced English I'm happy. - I'm over the moon. It's quiet. - It's dead silent. I'm sad. - I'm down in the dumps. It's clear. - It's crystal clear. I'm surprised. - I'm taken aback. It's fast. - It's lightning fast. I'm thankful. - I'm grateful beyond words. It's good. - It's exceptional. I'm angry. - I'm livid. It's difficult. - It's challenging. I'm bored. - I'm climbing the walls. It's important. - It's crucial. I'm frustrated. - I'm at my wit's end.