为什么 Maria spent two hours (doing) the work 填doing

为什么 Maria spent two hours (doing) the work 填doing I spent two hours on my homework一句中spend为什么要用过去式spent I spent two days in finishing reading this book.为什么不是spent.on? I spent two hours walking there.中的walking为什么用ing形式 she spent two hours practice playing basketball为什么practice是原型 she spent two hours ( ) the work 为什么括号里的要填finishing呐? A.How long did you spend there?B.We spent two days there.为什么回答不用要用spent 不用spend呢? Maria started learn Chinese two months ago.同义句Maria（ ）（ ）（ ）Chinese for two months. she (spent)two hours practicing playing basketball.（）是spend的过去式吗?这里为什么要用一般过去时? He spent two hours in cleaning his bed room yesterday.→He spent two hours in cleaning his bed room yesterday.变同义句.It_____ _____two hours_____ _____his bedroom yesterday“____”中为什么填took,me,to,clean? I prefer being outside.Maria says 合并成一句Will you walk to school?She asked me合并成一句What are they doing I didn't know合并成一句Do you know how I can go to the library改为同义句We spent two days finishing the work 改为同 Maria has two cups of milk for breakfast（对two cups提问） 为什么The girl in yellow is Maria为什么=Maria is in yellow The time spent was only two hours.spent的语法现象The time spent was only two hours.其中spent后置修饰time,这是什么语法现象? he spent two hours -- this book.A.in read B.on reading C.in reading D.to read.为什么不选c呢英语为什么不选b？ 为什么The girl in yellow is Maria=Maria is in yellow spent. _________ in the fog,we spent two hours in the forest.A.Lost B.To loseC.Losing D.Having lost为什么选A