八年级上册英语短语用法涉及多个方面，以下为综合整理：

一、动词短语

核心动词+介词/副词

- put off（推迟）：如 "put off the meeting"（推迟会议）

- give up（放弃）：如 "give up smoking"（戒烟）

- take off（脱衣/起飞）：如 "take off your shoes"（脱鞋）

- look after（照顾）：如 "look after your pet"（照顾宠物）

固定搭配

- go on vacation（度假）：如 "We're going on vacation next week"

- stay at home（待在家里）：如 "He likes to stay at home on weekends"

- have a good day（过得愉快）：常用作祝福语

二、形容词短语

be + 形容词

- be interested in（对……感兴趣）：如 "She's interested in music"

- be good at（擅长……）：如 "He's good at playing the guitar"

- be in good health（身体健康）：如 "He's in good health"

其他结构

- 形容词+介词短语：

如 "interested in learning"（对学习感兴趣）

三、副词短语

频率副词

- always（总是）：如 "She always wakes up early"

- never（从不）：如 "He never forgets his homework"

- sometimes（有时）：如 "They sometimes play football on weekends"

时间副词

- right now（此刻）：如 "We need to start right now"

- at the moment（此时）：如 "He's at the moment studying"

四、其他常用短语

健康相关

- have a cold（感冒）：如 "I have a cold and I can't go out"

- have a headache（头疼）：如 "I need to rest because I have a headache"

行为描述

- get along with（与……相处）：如 "They get along very well with their classmates"

- look after oneself（照顾自己）：如 "It's important to look after oneself"

日常活动

- do exercise（锻炼）：如 "I exercise every day"

- read a book（读书）：如 "He spends a lot of time reading"

五、注意事项

动词短语搭配需结合语境，如 "help with"（帮助）而非 "help do"

形容词短语常与系动词（如be）连用

副词短语可修饰动词、形容词等

建议结合具体语境记忆短语，通过例句理解用法，并通过练习巩固掌握。