如果他们当时跟我们说了实话，我们是能帮他们的。
If they had told us the truth, we could have helped them.
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had英 /hæd/|美 /hæd/
told英 /təʊld/|美 /toʊld/
解释
had told 是过去完成时，用在 if 条件句中表示对过去情况的假设（实际上他们没说实话）。told 是 tell 的过去分词。与主句的 could have helped 搭配构成第三类条件句，表示如果条件不同，结果本来可以是怎样的。
If they had told us the truth, we could have helped them.
had told 是过去完成时，用在 if 条件句中表示对过去情况的假设（实际上他们没说实话）。told 是 tell 的过去分词。与主句的 could have helped 搭配构成第三类条件句，表示如果条件不同，结果本来可以是怎样的。