现在是夏天可以用英语表达为 "It is summer now." 。

"Summer" 这个单词来自拉丁语 "summus",意思是 "highest" 或 "greatest"。在古罗马时期,夏天是一年中最热的季节,因此这个单词用来描述这个季节。

下面是一些英文例句及其中文翻译:

"The weather is hot and humid during the summer." (夏天天气热而潮湿。)
"I love going to the beach in the summer." (我喜欢夏天去海滩。)
"Summer is my favorite season because there are so many outdoor activities to do." (夏天是我最喜欢的季节,因为有很多户外活动可以做。)