My cat leapt <em>(leapt is definitely correct in native English - particularly in the more informal or spoken style of speech or writing)</em> out of the window yesterday. I searched for him for a long time in the area around my home, but I couldn't find him <em>(too many tense errors to explain there unfortunately)</em>. A few hours later I printed some posters <em>(or, notices)</em> and went to put them up on the <em>(a? which notice board in particular? 'the' if you're talking about a specific one, 'a' if it's one you found by chance, for example)</em> notice board. As soon as I put the posters up, my cat ran up to me!
