请教LZM-EX4-20,26

kuuiytt

20. Although the manager agreed to a more flexible work schedule, he said that it must be posted on the bullletin board so that both management and labor will know what everyone is assigned to do .

D.he said that the schedule would have to be posted on the bulletin board so that both management and labor would know what everyone was

答案:A

这题,我有三个问题:

1)LZM说,A比D好,是因为can 表主观,而have to 表客观,有宾语从句中,无需用had to 替代.这种区别在实际做题中,能用吗?好象不好把握啊.或者有什么其它判断标准.

2)管为东说:have to /be able to 的发起人一定是有生命的,可我在实际做题中,也发现发起人不一定是有生命体,这种规则在GMAT的实际考试中能用吗?

3)我发现在做题中,用时态来判断非常困难.比如这题的A,若比时态上看,根本就不对.GMAT语法中经常会有例外.不知时态的判断用什么标准好?LZM的书中介绍一些标准,可在实际做题中,经常发现不一致.

26,For some birds the sense of smell appears to play a role in navigation, since pigeones with surgicallly removed olfactory nerves were found to have increased difficulties in homing.

B.have been found to have increasing difficulty.

答案:B,我选了A

现在完成时的使用如果有时间状语,就比较好判断.可这一题,没有出现时间状语,是如何判断用现在完成时,还是用过去时呢.

时态真的也是一个难点.

谢谢.

kuuiytt

感谢.

mary1

20（1）这个题目就可以用have to 用于“生命体和由人组成的组织”，后一种有拟人的思路。如果通过时态是无法判断，甚至D在其他方面比A要好，比如代词的使用....这时候就是抓住主要动词不放。“LZM说,A比D好,是因为can 表主观,而have to 表客观,有宾语从句中,无需用had to 替代”让LZM 得非典吧，这肯定是他杜撰的。

    （2）注意拟人用法，这个很重要。拿题讲吧！

    （3）时态是整个英语的难点，能闪就闪，学会回避难点。

26、比较选项如果非要从时态入手，是几乎不可能解这个题目的。
        were found to have increased difficulties in homing
        have been found to have increasing difficulty in homing.

最大的区别是difficulty/ difficulties ,这是突破点。其实这个题目用哪个时态都不错，只是用现在完成时可以表示过去发生的事情对现在的影响。这个题目从逻辑意思上是可以体现这一点的。