1.一

有连词as soon as ;hardly(had)。

when ;No sooner(had) than 副词immediately;instantly ，介词on(doing)。

名词the moment ;the minite;the second;the instant ；等引导 。

如：As soon as he arived ,he said hello to me= Hardly had he arrived when he said hello tome =He had hardly arrived when he said hello to me =immediately he arrived ,he said hello to me =On his arrival ,he said hello tome=On arriving,he said hello to me =。 。

As soon as I aboarded the plane ,I felt sick（其它你按我上面的例子，自己变吧。