Unit 57 Инфинитив и герундий после глаголов try, need, help

I tried to keep my eyes open but I couldn’t.

Then I tried knocking on the door…

We tried to put the fire out but we were unsuccessful.

She tried asking Gerry but he was short of money too.

I tried to reach the shelf but I wasn’t tall enough.

I’m trying to concentrate.

I need to go away for a while.

She needs looking after.

They need cleaning.

Why are you leaving now? You don’t need to go yet, do you?