老是惦记英语怎么说

"老是惦记" 的英文表达是 "to keep thinking about / to keep dwelling on"。
这个表达来源于英语中 "to keep" 这个动词，表示 "保持" 或 "继续" 的意思，再加上 "thinking about" 表示 "想着" 或 "在考虑"。
例句：
I can't stop thinking about her. 我老是想起她。
I keep dwelling on the mistakes I made. 我老是惦记我犯过的错误。
I can't help but keep thinking about what she said. 我怎么也想不起来她说过的话。