[译] 今天早上很冷，但现在好像暖和起来了。
[误] It was very cold this morning, but it seems to be warmed up.

[正] It was very cold this morning, but it seems to be warming up.
[注] warm up 表示“暖和起来”时，是不及物动词短语，没有被动语态形式。该词组还可以表达“使热起来”之意，此时它是一个及物动词短语。