justnow是什么時態(tài)的標志詞

　　It sounds like the sea just now.

　　剛才它聽起來像大海。

　　I lost my chemistry book just now.

　　我剛才丟了我的化學書。

　　Now do as I did just now.

　　現(xiàn)在按照我剛才做的進行。