past tense

基本解释

They are simply testing whether you can use the past tense correctly!
他其實是在測試你是否會運用過去式廻答！
If you want to talk about work you did in the past, use the past tense, e.g.
如果你想談論你過去做什麽工作，用過去時態。
edu.sina.com.cn
But as you can see, all these questions are asked in the past tense - because the actuality of these are low.
但就像你所看到的，這些問句都是過去式，因爲這些東西的現實度都很低。

So you would say in the past tense "I lay on the bed because I was tired."
Everything that we had thought that Milton was telling us in the lyric present -- telling us directly, now -- suddenly gets shoved back into the narrative past: "thus sang the uncouth swain." The past tense is important there.
我們想過的彌爾頓在這首抒情詩裡,直接告訴我們的所有事，現在，都突然在過去的旁白中一湧而現了：,“吟唱著粗鄙的青年人“，這裡的過去時態很重要。
耶魯公開課 - 彌爾頓課程節選
So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.
因此這個句型要根據不同的時態，如過去時、現在時和將來時，作出一點調整；另外也會根據是否是問句而略有不同。
There is 課堂 - SpeakingMax英語口語達人

Note that these questions use a past tense voice, as if they have already occurred.
FORBES: How to Stop the Dreaded "Decision Drift"