Is it okay to say like this "when an inbox is twice fuller, these passes will take twice longer"?
Native speaker’s answer
Rebecca
I see what you are trying to do but we cannot say "twice fuller" or "twice longer". To implement the change from "with" to "when" the only thing that needs to change in the sentence is "with" and "that's", the rest of the sentence can stay as is and remain grammatically correct. So, the correct sentence would be, "When an inbox is twice as full, these passes will take twice as long".