Question

i was curious who he was和i was not sure if it was on sale or

Answer 1

其实你应该这样想

i was curious这个句子,我好奇,这个不也是现在在想的么,但用了过去时态说明是过去好奇的

其实这个应该带到固定的情景里面去,才不会让你疑惑,单独拿出来确实会有点感觉怪怪的,比如

first time i met Tom ,i was curious who he was 你看这样是不是感觉好多了

i was not sure 不也是这样么

英语里面讲究时态一致,这个是规矩