This shape is an antiprism.

His hair has been turning grey with each passing year.

He was surprised to the point of losing his screws.

He was reminiscing about his distant hometown.

As the new project leader, he immediately started to act mighty.

His email has many grammatical errors, making it difficult to understand.

It's not appropriate to get angry because he was late.

You must not smoke here.

It's not like he is a professional chef, so we can't expect much from the taste of his cooking.

It is currently summer in the Southern Hemisphere.