Instead of a single suffix, English uses different combinations of endings and auxiliary verbs to mark tense:
* Present tense: Usually no suffix, but sometimes "-s" for third-person singular (he/she/it)
* Past tense: Often "-ed" or "-d" (walked, played) or irregular forms (went, saw)
* Future tense: "will" or "shall" followed by the base form of the verb (will go, shall see)
Other tenses also use auxiliary verbs and various word order arrangements:
* Present perfect: "have" or "has" + past participle (have walked, has seen)
* Past perfect: "had" + past participle (had walked, had seen)
* Future perfect: "will have" or "shall have" + past participle (will have walked, shall have seen)
Examples:
* Present: I walk to the store.
* Past: I walked to the store.
* Future: I will walk to the store.
* Present Perfect: I have walked to the store.
* Past Perfect: I had walked to the store.
* Future Perfect: I will have walked to the store.
So, instead of a single suffix, it's important to understand the different ways English uses auxiliary verbs, endings, and word order to express different tenses.