-ed is added to form the past tense of regular verbs.
For most past simple regular verbs, add -ed:
climb - climbed. walk - walked
If the verb ends in a consonant + y the y changes to i and add -ed.
study - studied. cry - cried
If the verb ends in one vowel and one consonant, double the consonant and add -ed.
trip - tripped step - stepped
NB. Irregular verbs have a new word.
The rule for forming the past tense of regular verbs ending in -ed is to add "-ed" to the base form of the verb. For example, the base form "talk" becomes "talked" in the past tense.
For most verbs, the past tense form is created by adding "-ed" to the base form of the verb. However, there are irregular verbs that do not follow this rule and have different past tense forms altogether.
"Shared" is a past tense verb form of the verb "share." It is irregular in the sense that it does not follow the standard -ed ending rule for forming past tense verbs, but instead changes the internal vowels.
expect is a regular verb so the past is verb + -ed" expected
The past participle of the verb "like" is "liked".
Suffer is a regular verb so the past participle is verb + -ed suffered
For most verbs, the past tense form is created by adding "-ed" to the base form of the verb. However, there are irregular verbs that do not follow this rule and have different past tense forms altogether.
In the past tense, verbs ending in r often follow the regular -ed ending rule, such as "work" becoming "worked." However, there are some irregular verbs that do not follow this pattern, like "run" becoming "ran." It is essential to study and memorize the irregular forms to use them correctly in past tense sentences.
-ed is added to the end of the verb.
If the verb is regular then you simply add -ed. If the verb is irregular then the past tense is a different word/form. There's no rule in forming it, you simply have to learn the list.
A regular verb.
By adding -ed to the verb.
A regular past tense verb.
The past participle of the verb "like" is "liked".
Lace is a regular verb so the past is verb + ed = laced
expect is a regular verb so the past is verb + -ed" expected
A regular verb will end in -ed when it is in the past tense.
The past tense is danced. Dance is a regular verb so the past is verb + ed