No sooner had +主詞+過去分詞+than+主詞+過去式動詞

=Hardly  had +主詞+過去分詞+when+主詞+過去式動詞

=Scarcely had +主詞+過去分詞+before+主詞+過去式動詞

=As soon as +主詞+過去式動詞,主詞+過去式動詞

=The moment/The instant +主詞+過去式動詞,主詞+過去式動詞

例:

No sooner had I seen Ted than I told him the truth.

=Hardly had I seen Ted when I told him the truth.

=Scarcely Had I seen Ted before I told him the truth.

=As soon as I saw Ted, I told him the truth.

=The moment I saw Ted, I told him the truth.