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1·Somebody would have seen her.—I doubt it, not on Monday.

“有人可能见过她。”—“我不信，不可能在星期一。”《柯林斯英汉双解大词典》

2·While this can occur, I doubt it is the usual reaction.

虽然这有可能发生，但我很怀疑它是常态反应。

3·Perhaps the charm of the physical book will be lost one day. But I doubt it.

也许有一天纸质图书的魅力将不复存在。但我对此持怀疑态度。

4·Have they done the repairs?—Can't say off-hand, but I doubt it.

“他们修过了吗？”——“我一时说不清，但我想还没有”。《柯林斯英汉双解大词典》

5·I doubt it, she talked back.

“我对此表示怀疑。”她反驳道。

6·I doubt it will do.

这样不行吧？《新英汉大辞典》

7·I doubt it, said the clockmaker.

“我真怀疑，”钟表匠说。

8·Khrushchev; I doubt it.

赫鲁晓夫：“对此我很怀疑。”

9·I doubt it. He never means it.

我怀疑。他从来都说话不算话。

10·B: Well, personally, I doubt it.

唔，就我个人来说，我对此相当怀疑。