In past simple tense regular verbs generally have +ed added to the end, some consonants double up first and of course there are plenty of irregular verbs to throw you off! But despite the ending being the same there are 3 distinct pronunciations, one o the tools we use in class is the following;
~Words that end with the following consonants.... B G L M N RV or Z are pronounced with like the end of FreD...
eg: beggeD swimmeD RibbeD
~ words that end with the following consonants ..... F ( includes some Ph and GH sounds) K P S SH CH or TH are pronounced with a shorter clipped sound more like the T at the end of the name BerT
Liked (likT) skipped (skipT) watched (watchT) Laughed (laughT)
~ words which end in the following consonants T and D are pronounced with an ID sound
wetted (wettID) fitted (fittID) wedded (weddID)
Hope that helps some of you out :)