+1
1-)I have changed my mind about buying a new TV because I do not have enough money.(afford)
I can't afford a new tv ...
2-)I might not be later,so take your keys with you.(case)
take your keys with you in case you need them later.
3-) the machine will only start if you press this button.(unless)
The machine won't start unless you press this button.
4-)Ms. Walter advised her student to study more.(if)
'I'd study more if i were you.' Ms walter said to her student.
5-)I will tell you my secret, but only if you don'ttell anyone else.(as)
I will tell you my secret as long as you do not tell anyone else.
6-)is it OK if I go to cinema tonight?(may)
May I go to cinema tonight?
7-) you are not allowed to eat anything in the computer lab.(must)
you must not eat in computer lab.
8-) the film and the book were equally funny.(as)
the film was as funny as the book.
9-)that is the best film I have ever seen.(never)
I have never seen such a good film
10) booking tickets in advance is not necessary.(book)
you don't need to book the tickets in advance.