那后頭加動(dòng)詞，得用的是不定式，像“那后加to do”。

在英語(yǔ)中，"that" 后加動(dòng)詞時(shí)，通常使用動(dòng)詞的過(guò)去式。例如，如果你想說(shuō) "I saw the movie yesterday."，你應(yīng)該說(shuō) "I saw the movie." 或者 "I saw it yesterday."
但是，如果你想要強(qiáng)調(diào)動(dòng)作發(fā)生在過(guò)去某個(gè)具體的時(shí)間點(diǎn)或時(shí)間段內(nèi)，你可以使用現(xiàn)在完成時(shí)態(tài)。例如，如果你想說(shuō) "I have seen the movie before," 你可以說(shuō) "I have seen the movie before." 或者 "I have seen it before."
另外，如果你想要表達(dá)對(duì)過(guò)去某個(gè)事件的回憶或回顧，可以使用現(xiàn)在完成時(shí)的被動(dòng)語(yǔ)態(tài)。例如，如果你想說(shuō) "The movie was seen by me," 你可以說(shuō) "The movie was seen by me." 或者 "The movie was seen by me."

that后加動(dòng)詞用原形。