they are study for tests now 用yesterday改为一般过去时 I am playing the piano now.用ye...

They are study for tasts now(\u7528yestarday\u6539\u4e3a\u4e00\u822c\u8fc7\u53bb\u65f6)

They studied for tests yesterday.



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I played the piano yesterday

They studied for tests yesterday .

they were studying for tests yesterday

扩展阅读：they study chinese ... take a shower ... texas instruments ... xbox series x ... they are billions ... have a snack ... is this your bedroom ... dining room ... this war of mine ...