教材同步复习第一部分 Grade 8 Book 1Units 8 ~ 10unless 为连词,意为“除非;如果不”,用来引导条件状语从句,相当于 if
Don't leave the classroom unless I tell you to
= Don't leave the classroom if I tell you not to
我不叫你离开教室,你就不要离开
You will be late unless you go there by bus
= You will be late if you don't go there by bus
如果你不乘公共汽车去那里,你将会迟到
中考考点 · 精讲unless 的用法without 为介词,意为“无;没有;缺少”,后面接名词、代词或动名词作宾语
介词 with 是其反义词
Fish can't live without water and air
没有水和空气鱼无法生存
We couldn't finish the work on time without your help
没有你的帮助,我们就无法按时完成这项工作
注意: without 为介词,之后接动词时,要用 v
- ing 形式;接人称代词时,要用其宾格形式
without 的用法 invite 是及物动词,其常见用法有:invite 的用法 句型结构意 义例 句 invite + sb
邀请某人He invited my family yesterday
昨天他邀请了我全家
invite + sb
+ to do sth
邀请某人做某事They've invited us to stay for the weekend
他们已经邀请我们留下