判断几句英文的结构问题

题目

判断几句英文的结构问题
判断三句话的语法结构：
1 We are taking some of the steps needed to get started,but we need your help to go the rest of the way.
2 However,there are also a lot of people who prefer to buy a cheap house there anyway.
3 Researchers studying teenagers concluded that,in that hazardous environment,mobile phones were regarded as "security objects" in parent-teen relationships-important because they provided the possibility of contact and communication at all times.
这三句都是复合句吗?第一句是宾从、第二句句子是定语从句、第三句是主语从句和同位语从句都用到了吗
快来分析呢,我基本上不知道语法该怎么划分!

答案