Sometimes it’ s so cold I don’ t even want to leave the house. 有时天冷得让人不想出屋。

I sometimes wonder if all this work is really worth it. 有时我会怀疑所有这些工作是否真的值得。

My dad cooks dinner sometimes, but usually my mum does it. 有时我爸爸做晚饭，但通常是妈妈做。