I made some suggestions :) I wasn't 100% sure if these were what you had in mind, but I think they do sound better like this :) I hope this helps. Best of luck! 1. It was not as nice as I thought it would be. (Indicating I did something and before I did, I thought I would do it well.) Suggestion: It was not as nice as I had thought it would have been. (past simple + past perfect = you had thought about it before it happened) 2. It was not as nice as I thought it would've been. (Indicating the same situation as the last sentence does, just this one is more focused on how I feel after the task.) Suggestion: It hasn't been as nice as I thought it would be. (would is a modal verb, if you want to convey the present perfect tone you should use the verb, like in the sentence I wrote) 3. It was not as nice as you think it would've been. (The context here would be I'm talking with someone about something I've just done. And the person is thinking I must have done it well, but unfortunately I haven't.) Suggestion: It hasn't been as nice as you think it has. (similar to the previous example, modal verbs are ruled by their own set of rules :) ) I wanted to know whether my understanding of these structures of sentence is correct. Any help will be appreciated!