on saturday evening是过去时时态。
saturday：n. 星期六。
evening：n. 傍晚; 晚上; 晚会; 晚间活动。
扩展资料
The Student Union is going to hold a party on Saturday evening.
学生会计划在星期六晚上举办晚会。
I often write home on Saturday evening.
星期六晚上我常常写家信。
Youre right. weve decided to hold it on Saturday evening.
对，我们已决定于周六晚举行。
I will have a date with a beauty on Saturday evening!
星期六晚上，我和一美女约会！
Id like to book two seats for Swan Lake on Saturday evening.
我想买两张星期六晚上《天鹅湖》的票了。
