when was doing是什麼時態[朗讀]

when was doing是一般過去時。
doing
v.做；干（do的ing形式）。
n.活動；所作所為。
例句：
what on earth are you doing
你究竟在幹什麼？
shes doing a terrific job
她活兒乾得真棒。
擴展資料。
what the deuce is he doing
他到底在幹什麼？
good heavens,what are you doing
天哪，你在幹什麼？
that's the idea!you're doing fine
對啦！你做得不錯。