"Sometimes" 是一个表示频率的副词，用来描述某个动作或事件偶尔发生。以下是一些适合五年级学生使用的 "sometimes" 造句：

I sometimes ride my bicycle to school.我有时骑自行车上学。

She sometimes helps her mother with the housework.她有时帮妈妈做家务。

Sometimes I read a book before bed.我有时睡前看书。

They sometimes play soccer in the park.他们有时在公园里踢足球。

Sometimes the sky is blue, and sometimes it's gray.天空有时是蓝色的，有时是灰色的。

I sometimes stay up late to finish my homework.我有时熬夜完成作业。

Sometimes I help my friends with their projects.我有时帮助朋友们做项目。

Sometimes the train is late.火车有时晚点。

She sometimes sings songs at karaoke.她有时在卡拉OK唱歌。

Sometimes I go for a walk in the evening.我有时晚上散步。

这些句子简单易懂，适合五年级学生的理解水平。希望这些例子对你有所帮助!