once什么意思英语（医学上once是什么意思）

编辑：朱老师

审核：王老师

适合人群：初中学生及家长、英语教师等

onceadv.一次，曾经

一周一次onceaweek

立刻，马上atonce=rightaway

再一次onceagain=oncemore

once表示“曾经”，用于一般过去时。

同义词：everadv.“曾经，在任何时候”

几乎从未：hardlyever

永远：forever

次数的表达

once一次；一倍

twice两次；两倍

threetimes三次；三倍

1.Weshouldneverforgetthelessonsfromthehistory.

=Weshould_____thelessonfromthehistoryfor_____.

2.Thestudents_____learnedthesenewwords,sotheymightusethem.

A.ever

B.never

C.always

3.—Doyouknowanythingaboutvolleyballmatches?

—Nothingmuch.I_____watchedthem.

A.hardlyever

B.almostever

C.hardlynever

4.IknewwhoshewasbecauseI_____sawherinabigparty.

A.once

B.twice

C.never

5.MikeandTomevermeteachother_____,andtheykneweachotheratthesecondtime.

A.once

B.twice

C.threetime

6.—Howoftendoyouhaveaschooltrip?

—_______.Sinceafewaccidents(事故)happened,alltheschooloutdooractivitieshavebeenasked（被要求）tostop.

A.Always

B.Sometimes

C.Hardlyever

7.Ionce_______(have)pianolessons.

答案↓