(1) I came up with the conclusion based on the evidence I collected.
(2) I came up with the conclusion based on the evidence I have collected.
Some of my non-native English speaking friends think (1) is grammatically correct because the verbs "came" and "collected" are both in the past tense. But, my other friends and I think (2) is grammatically OK if you use the present participle "have collected" even though "came" is in the past tense. The reason is that you might be using ALL the pieces of evidence that you have collected up until now.
What is your opinion? Thanks a lot.
(2) I came up with the conclusion based on the evidence I have collected. (1) is correct. (2) doesn't work because you reached your conclusion at some time in the past.
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ansonguy(1) I came up with the conclusion based on the evidence I collected.(2) I came up with the conclusion based on the evidence I have collected.
(1) is correct.
(2) doesn't work because you reached your conclusion at some time in the past. Let's say it was Thursday of last week. Then you say you used evidence that you have collected, which mean