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xunzlyx 发表于 2013-8-16 14:12
思路很赞~
只是不明白,这样的话appear为什么不用过去式appeared
问题很好,我找了一下外国盆友也有同样的问题。然后Ron神给解答了,如下:
提问:Further , one question still remains , which construction is better in context
appear to have been equipped
appeared to have been equipped
Basically I wanted to know which is the correct verb tense here
解答:by default, "appear" is in the present tense, since we're talking about the way these things appear to present-day observers.
if there were a context that would place "appear" in the past, then you could use the past tense. for instance: to nineteenth-century observers, they appeared to have been equipped...
but, absent such a context, you should go with the present, for simplicity (the default assumption is that this "appears" to be the case to present observers).
in this case, you've also got parallelism between "appear" and "indicates", two descriptions that both describe observations made in the present.
since "indicates" is not underlined, that determines the tense context. so your other observation, which is made at the same time, should be parallel to it.
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