涉及到時態，In +段時間 是一般將來時 以為幾天/月/年 以後 用how soon 回答 He will finish the project in 3days. 如果想表達在段時間內 可以用 over/during 時態的話 具體看語境 多數情況是一般過去時 現在完成時 Over the past decades the city has witnessed the great changes。 During the fifty years of his career as an actor，he starred in some superhero films. They discussed some issues about personal growth over afternoon tea.

現在完成進行時

比如,She has been crying over 2 hours.她已經哭了兩個多小時了.

表示動作從過去持續到現在而且還有可能繼續下去.