▁triggered ▁vo icing ▁assim ilation , ▁so ▁that ▁t ▁appeared ▁whenever ▁the ▁preceding ▁stem ▁ended ▁in ▁a ▁vo ic eless ▁con son ant . ▁This ▁phenomen on ▁remains ▁in ▁modern ▁Dutch . ▁Un sync op ated ▁forms , ▁which ▁retain ▁the ▁full er ▁suffix ▁- ed -, ▁are ▁sometimes ▁found , ▁especially ▁with ▁st ems ▁ending ▁in ▁a ▁lab ial ▁or ▁vel ar ▁con son ant . ▁ ▁Some ▁former ▁class ▁ 1 ▁weak ▁ver bs ▁retained ▁so - called ▁Rück um la ut . ▁These ▁ver bs ▁had ▁under g one ▁um la ut ▁in ▁the ▁present ▁t ense , ▁but ▁the ▁um la ut - trigger ing ▁v owel ▁was ▁sync op ated ▁in ▁the ▁past ▁t ense ▁already ▁in ▁Old ▁Dutch , ▁prevent ing ▁um la ut ▁from ▁taking ▁hold ▁there . ▁Thus , ▁s enden ▁had ▁the ▁first - ▁and ▁third - person ▁singular ▁past ▁t ense ▁s ande . ▁These ▁ver bs ▁t ended ▁to ▁be ▁re inter pre ted ▁as ▁strong ▁ver bs ▁in ▁later ▁Middle ▁Dutch ; ▁s ande ▁itself ▁gave ▁rise ▁to ▁the ▁modern ▁z ond , ▁mirror ing ▁strong ▁class ▁ 3 . ▁ ▁See ▁also ▁Middle ▁Dutch ▁literature ▁Low ▁German ▁German ic ▁languages ▁ ▁Notes ▁ ▁External ▁links ▁ ▁Middle ▁Dutch ▁text ▁database ▁( T IT US ) ▁Gram mat ical ▁information ▁on ▁Middle ▁Dutch ▁( in ▁Dutch ) ▁Sp oken ▁examples ▁of ▁Old ▁Dutch , ▁Middle ▁Dutch ▁and ▁Old ▁F ris ian ▁( in ▁Dutch ) ▁▁▁ ▁Category : History ▁of ▁the