上课认真听讲用英语怎么说认真做作业用英语怎么说

"Pay attention in class" and "do homework seriously" can be said as "Pay close attention in class" and "take homework seriously" respectively in English.

These expressions are commonly used in English and are considered idiomatic expressions, meaning that they have a figurative meaning that is different from the literal meanings of the individual words.

Example sentences:

"I always pay close attention in class so that I can understand the material better."
"If you want to get good grades, you need to take homework seriously and put in the effort."

中文翻译:

"我上课总是要认真听讲，这样我才能更好地理解材料。"
"如果你想得到好的成绩，你需要认真做作业，付出努力。"