Her mouth started to move, to try and form the next words, but nothing emerged at first.

For a moment he thought that Terry was going to say something important, because his mouth started to form a word, but nothing came out.

He looked up, and his mouth started to open.

Her mouth started to open and she closed it with a snap.

I saw one on television and my mouth started watering.

When I find just the right one my mouth starts to water.

His mouth started to move, but nothing came out.

Still, his mouth was starting to open, and what would come out of it he didn't know.

I didn't know what to say, so my mouth just started acting on its own.

He could smell breakfast cooking and his mouth started to water.