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How to use 'Unless' and 'As long as'

'We'll catch our flight as long as we leave soon.'
As long as Take a look at this sentence:

I will go if it is free.
(If it is free, I will go.)

In this sentence we can change if to as long as and it keeps the same meaning:

I will go as long as it is free.
(As long as it is free, I will go)

Here are some other examples:

You can borrow my bike as long as you are careful. = You can borrow my bike if you are careful.

You will pass the test as long as you study hard. = You will pass the test if you study hard.

Unless
Now let's look at the same 'if'sentence using a negative:

If it isn't free, I won't go.
(I won't go if it isn't free.)

Here we can use unless to keep the same meaning:
Unless it is free, I won't go.
(I won't go unless it is free.)

Unless means 'except if' or 'only if'.
Here are some other examples:

I'll walk to town unless it rains. = If it doesn't rain, I'll walk to town.

Unless we leave now, we'll be late. = If we don't leave now, we'll be late.

You can't enter unless you have a ticket. = Only if you have a ticket, can you enter.

Now read the following sentences and decide if 'unless' or 'as long as' should be used:

Then, use the comments box give us some of your own example sentences using 'unless' and 'as long as'.

Link: 'I am used to'... lesson

You should not swim in the river ___ you are a good swimmer.

unless
as long as

I will take a day off ___ my boss says that it is ok.

unless
as long as

You can improve your English ___ you use this site!

as long as
unless

You will not get fit ___ you stop smoking.

unless
as long as

It does not matter how it tastes ___ you do not eat it.

as long as
unless

She will be angry with him ___ he says sorry.

as long as
unless

There is no need to wake up early ___ you want to.

as long as
unless

The rock concert will be good ___ you don't mind loud music.

as long as
unless

My pet lion will not bite you ____ you do not get too close.

as long as
unless

Fast food is great ___ you eat too much of it.

as long as
unless