Very probable: should and ought to

Both should and ought to are used to say that something is very probable, very likely, or 90 percent sure to happen — that if everything is normal, as expected, or as planned, a condition will very probably exist or something will very probably happen:

The rebel territory should settle down once winter comes.

The rebel territory ought to settle down once winter comes.

In the examples above, either should or ought to can be used — they have the same meaning — however, only should is used in questions:

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Should Tom zip up his jacket?

Ought Tom to zip up his jacket?

and only should not or shouldn't is used in negative sentences:

Tom should not zip up his jacket.

Tom ought not to zip up his jacket.

Should not (or shouldn't) is used to say that something is not probable. It means that something is very improbable, very unlikely, or 90 percent sure not to happen — that if everything is normal, as expected, or as planned, a condition will very probably not exist or something will very probably not happen:

I set the thermostat at sixty-five degrees, and I'm sure it won't get below seventy tonight, so the heat shouldn't go on.

1. look around p.v. When you turn your head to see what is behind you or around you, you look around.

I heard a sound, and I looked around to see who it was. Sally looked around the room and didn't recognize anyone.

2. look around p.v. When you look around or look around a place, you go to various parts of the place in order to see what it is like or what is there.

You should look around before you decide whether you want to buy the house.

Linda looked around the bookstore but didn't find anything interesting.