<span class="searchmatch">improvisaches</span> second-person singular preterite indicative of improvisar...
<span class="searchmatch">improvisache</span> (reintegrationist norm, less recommended) second-person singular preterite indicative of improvisar...
improvisaba improvisabamos improvisabades improvisaban Preterite improvisei <span class="searchmatch">improvisaches</span> improvisou improvisamos improvisastes improvisaron Pluperfect improvisara...