The contraction "that'd" can be replaced with other words and phrases, depending on context. For example, "that would" or "that had" can replace "that'd" in certain situations. In some cases, "it would" or "there would" may also be suitable alternatives. Additionally, slang expressions like "that's" or "that is" can sometimes be substituted for "that'd" in informal speech. When writing formally, it is generally advisable to avoid using contractions and opt for the full words or phrases instead. However, when speaking informally, using synonyms and contractions can help to convey a more relaxed and conversational tone.
