题目选项分析

比较两个句子语法结构语义，选出最佳答案：

The personal income tax did not become permanent in the United States until the First World War; before that time the federal government had depended on tariffs as its main source of revenue

The personal income tax did not become permanent in the United States until the First World War; before that time tariffs were what the federal government was dependent on to be its main source of revenue

写下分析过程，便于复习“吃透”这个句子：

答对用户笔记

0人: lydia1054 2020-12-28 10:11:27

需使用過去完成式，主動的型態也優於被動型態

0人: 四战740 2020-11-26 18:50:54

1. wordy
2. 过去完成时

0人: 爱学习的小曦 2020-07-23 08:26:02

wordy & for a time before a past time, use past perfect (had depended)

0人: 大番茄红晃晃 2019-04-19 11:16:19

1) it's as main source at that time, but not to be

0人: qq386730246 2018-12-05 19:32:13

出现时态标志before,并且前面时间点是过去式，所以后面用past perfect.

0人: livingston666 2018-08-12 16:45:40

出现了明显时态标志before that time，前面用的一般过去时，所以后面发生在过去的过去，应该用过去完成时had done

0人: zigzagyan 2018-06-02 18:18:18

wordy

题目基本信息

所属科目：语法SC
题目来源1：OG18-语文分册-206
题目来源2：OG19-语文分册-206
题目来源3：OG20-语文分册-215

难度：易