Present perfect
初中 Junior High现在完成时
🧩 词语组成解析
🗣️ 情景例句
It's a serious matter for a lot of us.
对我们许多人来说这可是个严重的问题。
You should wear a heavy coat, It's below zero today.
你应该穿一件厚大衣，因为今天在零度以下。
A huge iceberg was suddenly spotted by a lookout.
突然，了望员发现一座冰山。