Though I don't like to encourage focusing on what you don't have, or are not able to do, it's important to understand the difference here between possible and impossible.
Irregular Verbs List 2nd Grade | Irregular verbs in present tense list
Present perfect tense vs simple past tense | http://www.engames.eu/present-perfect-vs-past-simple_t/
English Grammar Worksheet, Past Perfect Simple, http://www.allthingsgrammar.com/past-perfect.html
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Cuketové lasagne se sýrem, vajíčkem a krůtí šunkou | NejRecept.cz