A little care is needed with the ...ing form. The ...ing form is used for other things as well as tense forming.
The ...ing form is very often used to make a noun into a verb.
A garden is bit of land with nice flowers. Gardening is all the things I do in the garden, like when I dig out weeds.
The ...ing form is also used for making things sound more polite.
We think your company should be closed. This sounds short and unfriendly.
We are thinking of closing your company. Of course nobody wants to hear this, but it is a little more polite.