Verbs can be simple to understand sometimes. Verbs are action words. What complicates the understanding of verbs are the tenses. Understanding when to use which tense and in which situations is what makes it complex. Down below are some general rules that can be helpful in understanding the tenses and when to use them.
Simple Present (Basic Form or S- form): Shows general facts, constant states, or habitual or repetitive actions. It is also used for future events.
Ex: They walk home together.
Simple Past (Base For + -ed or -d or Irregular Form): Expresses actions that happened during a specific period of time in the past. It can also show states of being in the past.
Ex: They walked home together.
Simple Future (Will + Base form): Shows actions that will happen at some time in the future.
Ex: They will walk home together.
Simple Progressive Forms are for continuing actions.
Present Progressive (Am, Is, Are + Present Participle): Present progressive show verbs that are in progress at the present time.
Ex: They are walking together.
Past Progressive (Was, Were + Present Participle): Show actions that were in progress at a specific time in the past.
Ex: They were walking together.
Future Progressive (Will + Be + Present Participle): Future progressive verbs show actions that will be in progress at some point in the future
Ex: They will be walking together.