Question

英语句子成分帮忙分析

we wanted to know if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food

if引导的 宾语从句中 谁是谓语 如果是affected 那么 food is in contact with a contaminated surface 又是什么成分 希望高手详解

Answer 1

We主 wanted谓 to know宾 if the length of time food is in contact with a contaminated surface affected the rate of transfer of bacteria to the food
if宾语从句引导词 the length of time food主语 is系动词 in contact表 with a contaminated surface状语 affected the rate of transfer of bacteria to the food：affected：过去分词短语作定语
is in contact with短语：与…有联系
我们想知道食物与污染表面接触的时间长短是否会影响细菌向食物传播的速度。

Answer 2

学好从句之前学好句子的成分很重要。