1.The car I bought yesterday was really expensive. 2.The car I bought yesterday is really expensive. 請問哪個對啊?

The car I bought yesterday +
The car is/ was really expensive
子句- I bought yesterday的動詞可不需與主動詞一is/was 一致，
但從實務上昨天的感覺不會一天就變了，
故用 is 比較實在些

1.The car I bought yesterday was really expensive.

2.The car I bought yesterday is really expensive.

“costly”都表示物品價格“高的、昂貴的”的意思。



☆ 基本上, 兩句都通, 因為該汽車本來就是「高尚、貴價」的款嘛！ （本人比較偏向這個組合句）

可是句子1⃣️的“bought yesterday"跟助動詞"was", 是前後時式一致的。按老師的標應該會選句子1⃣️唄！

The past tenses of a verb are the ones used to talk about things that happened at some time before the present. The past tense uses the past form of a verb "buy--->bought.""bought---->was"The sequence of tenses in Grammar is the rules according to which the tense of a subordinate clause depends on the tense of a main clause, so that,eg:-"bought yesterday----->was"
If something is expensive, it costs a lot of money.Car is so expensive in this country yesterday. The car was expensively costed yesterday.
Hence(1)The car I bought yesterday was really expensive.