Which formula is used to indicate simple past tense? a. verb + -ed b. verb c. will + verb d. have + verb + -ed

Hello.

Simple past tenses are usually indicated by the word "have" and is proceeded by a verb that ends with "-ed".

Here is an example:
"I have lived in Japan for 5 years."

Your answer is "D.) have verb + -ed"

I hope this helps!

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form