'Now these things were our examples, to the intent we should not lust after evil things, as they also lusted.'
So these things were examples for us, given as a lesson so as to prevent us from doing the same, that is, preventing us from setting our minds on evil things, idolatry, fornication, trying God and murmuring. 'These things' (compare 1 Corinthians 10:11) looks ahead to the verses that follow, for what came earlier would not have been examples that prevented the desire for evil things in the Corinthians.
'We should not lust after evil things, as they also lusted.' This may refer to the cry of the people for 'the flesh pots of Egypt' (Exodus 16:3 compare Numbers 11:4-6) and stresses the danger of looking back, and regretting the loss of the past. This was the precise nature of the problem that could arise from knowingly eating food sacrificed to idols, a regretting of the past and a looking back, but his use of 'we' shows that it went wider than that. All, (Paul included), had to be aware of the danger of human desires and longings, and a looking back to the things of the world (1 John 2:15-16).