Posted by: @friska "If the earth stops rotating, it would lose its gravity. Everything would float as if they had no weight."

Benarkah grammar kalimat di atas?

Kalimat di atas bentuknya conditional sentence yang mengutarakan teori, bukan fakta (bumi tidak berhenti berputar). Jadi harus menggunakan conditional sentence type 2 (if+simple past+would+verb 1) jadi frasa "stops rotating" salah, seharusnya "stopped rotating".