The two most common prepositions used after the verb "think" are "about" and "of." They are very similar, but there is a small difference.
Usually when you think of something, it is a brief moment - just a few seconds. It is also used for opinions. When you think about something, you are considering it for a longer time - like a few minutes or more.
Every time I hear this song, I think of my mother.
(thinking for a few seconds)
What do you think of my new haircut?
I'm thinking about moving to a different city.
I still get angry when I think about all the rude things my sister said to me. (thinking for a few minutes or more)
Common error: Don't use "think to" for "considering."
I'm thinking to do an intensive English course in Canada.
I'm thinking about doing an intensive English course in Canada.
It is important that all four corners of the refrigerator base are supported firmly on the floor to eliminate any cabinet movement. Installing the appliance on a soft or uneven or unlevel floor may result in twisting of the cabinet and poor sealing of the doors. Before moving your refrigerator into its position, ensure that the adjustable front feet are fully retracted by turning them anticlockwise. Position your refrigerator. Turn the adjustable feet clockwise, to lower the adjustable front feet. Raise the front of the appliance until it is stable and the doors move towards the closed position, on their own, when open.The front levelling foot on the hinge side should take the majority of the weight of the cabinet and the cabinet should be stable, ie cabinet should not rock or wobble.