What is a past tense of build in sentence?

Here are some past tenses of "build" in sentences, along with explanations:

* Simple Past: "They built a house last year." (This is the most common past tense form)

* Past Participle: "The bridge has been built for over a century." (Used in perfect tenses)

* Past Continuous: "We were building a sandcastle when the tide came in." (Indicates an ongoing action in the past)

* Past Perfect: "They had built the fence before we moved in." (Indicates an action completed before another past action)

The best past tense to use depends on the context of your sentence and the specific meaning you want to convey.