1
decorate sth (with sth)
用某物装饰某物，with短语可省略。
They decorated the room with balloons and streamers.
他们用气球和彩带装饰了房间。
装饰；装点
decorates — third person singular of decorate
先理解核心含义，再看它在真实句子里的用法。
装饰；装点
to make something more attractive by adding ornament, colour, etc.
They decorated the room with balloons and streamers.
他们用气球和彩带装饰了房间。
装饰
To furnish with decorations.
改善室内外观
To improve the appearance of an interior of, as a house, room, or office.
授予勋章或荣誉
To honor by providing a medal, ribbon, or other adornment.
通过附加代码扩展方法
To extend a method, etc. by attaching some further code item.
decorate
Base
原形
decorates
3rd person
第三人称单数
decorating
-ing
现在分词
decorated
Past
过去式
decorated
Past participle
过去分词
She decorates the room every year.
她每年装饰房间。
规则动词，过去式/过去分词加-ed
We decorated the living room with balloons and streamers for the party.
我们为聚会用气球和彩带装饰了客厅。
Every year she decorates a small Christmas tree in the kitchen.
每年她都在厨房装饰一棵小圣诞树。
They are decorating the cake with fresh fruit and chocolate.
他们正在用新鲜水果和巧克力装饰蛋糕。
用某物装饰某物，with短语可省略。
They decorated the room with balloons and streamers.
他们用气球和彩带装饰了房间。
授勋意义，for引出原因。
The general decorated the soldier for bravery.
将军因英勇而授予该士兵勋章。
被动形式，因某事受勋。
He was decorated for his service in the war.
他因战时服役被授勋。
Not this
I bought some decorate for the house.
Use this
I bought some decoration for the house.
汉语的“装饰”可以作名词和动词，但英语的 decorate 只是动词，其名词形式是 decoration，这里需要名词作宾语。
Not this
She decorated the room by balloons.
Use this
She decorated the room with balloons.
当表示装饰所用的材料时，decorate 后应接介词 with，而不是 by。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
用…装饰
They decorated the hall with balloons and flowers.
他们用气球和鲜花装饰了大厅。
装饰房间
She spent the weekend decorating her room.
她整个周末都在装饰她的房间。
装饰房子
We usually decorate the house for Christmas.
我们通常为圣诞节装饰房子。
装饰蛋糕
She learned how to decorate a cake with icing.
她学会了用糖霜装饰蛋糕。
装饰树
The children helped decorate the Christmas tree.
孩子们帮忙装饰了圣诞树。
用…装饰房间
They decorated the room with colorful curtains.
他们用彩色窗帘装饰了房间。
Use decorates naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
装饰（decorate）联想：用装饰品（deco）给房间评分（rate），使其更美观。
中性；常用于家庭、节日、派对等日常装饰场景。
All listed words share the same stress pattern (primary stress on first syllable) and end with the same pronunciation /reɪt/ (or /leɪt/ for 'calculate'), but note that the stressed vowels differ (e.g., /ɛ/ in 'decorate' vs /ɑ/ in 'operate', etc.), so they are not perfect rhymes. The suffix '-ate' is a spelling lookalike but its pronunciation consistently /eɪt/ in these words.
Dictionary facts from ECDICT, WIKTIONARY.