A suffix is added to the end of a word to make the word brand new
A suffix is added to the end of a word because that's just what they do
When we add 'ed' to a regular verb that ends in a 'd' or a 't'
The suffix sound is 'ed' and it makes the verb past tense
Melt becomes melted
Salt becomes salted
Land becomes landed
Applaud becomes applauded
Keep going, you can do this
When we add 'ed' to a regular verb with a voiced consonant
The sound it makes is 'd' and the word becomes past tense
Roar becomes roared
Rain becomes rained
Play becomes played
Clean becomes cleaned
That's how you add 'ed' to the end of a word