1.as soon as 一…就…

We chose the house for our home as soon as we saw it.
我们一看见这所房子，就把它选作我们的家了。

I phoned him so that he shall come as soon as possible.
我给他打了个电话，让他能尽可能快地到来。

2.change into 变成；把…变成

Experts have warned for months that the H5N1 strain of bird flu could change into a form that spreads easily between people, a development that would spark a pandemic.
数月以来，专家们一直在警告说H5N1禽流感毒株可能突变成一种易于在人与人之间传播的类型，这可能导致人类流感大流行。

There is concern that the virus-if given enough opportunities-will change into a form that is highly infectious for humans and spreads easily from person to person, but this has yet to occur.
令人担忧的是，如果有足够的机会，该病毒将转变成对人类具有高度传染性并很容易在人际传播的形式，但尚未发生这样的事情。