这句是一个并列复合句，需逐层分析 第一层：并列句结构，由and连接两个并列分句， 并列分句1：She plunged into the paints ； 并列分句2：before I knew it she had swept several fierce strokes and slashes of blue on the absolutely terrified canvas
第二次：并列分句2是一个主从复合句， 其中的从句部分是时间状语从句，为：before I knew it ； 其中的主句部分为：she had swept several fierce strokes and slashes of blue on the absolutely terrified canvas（本句中，she为主语，had swept为谓语，several fierce strokes and slashes为宾语，on the absolutely terrified canvas为状语）
第2个回答 2020-01-17
学好从句之前学好句子的成分很重要。
第3个回答 2013-09-26
she plunged into the paints 和before I knew........这是个并列句。 She主语 plunged 动词 into the paints地点状语 ———————————————————————————————— before I knew it 时间状语从句 she主语 had swept动词 several fierce strokes.........blue 宾语 on the ......canvas 地点状语
第4个回答 2013-09-26
这是一个并列复合句 •She是主语 plunged into是谓语 the paints是宾语 后面是并列的复合句 and是并列连词 before I knew it 是状语从句 she 是主语 had swept 是谓语 several fierce strokes and slashes of blue 是宾语 on the absolutely terrified canvas.是状语本回答被提问者和网友采纳