from time to time

含义

occasionally, without a regular pattern

偶尔，没有固定规律.

例句

1. 1We still exchange postcards from time to time, although months can pass between them.
2. 2From time to time, a fox visits our garden, but we never know when to expect it.
3. 3My old teacher writes from time to time; her last two letters arrived three months apart.
4. 4Most pages print perfectly, but from time to time a blank sheet appears among them.
5. 5We usually have fruit after dinner, but from time to time we share a box of chocolates.

语法

固定的状语短语。重复使用单数的 time，不加冠词；用 from 和 to 连接。

意思相近