-d and -ed

This is the -d and -ed suffixes

A suffix is a group of letters that go at the end of a word to give it meaning

The -d and -ed suffixes are used to change the tense of verbs

A verb is an action or doing word

Adding the -d or -ed suffix to a verb, makes the verb past tense

For example, calculate -> calculated

Synthetic Inquiry: Technically, there is only one suffix to make a verb past tense (-ed). When we have a word that ends in 'e', we are technically dropping the 'e' and then adding -ed. Write a rule in your book in your own words to help you remember this.

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