rewwrite the following sentences using''if clause''
11. Tom is not tall enough to reach the shelf
=>If ..............................
12.Joe was only promoted because he is a nephew of the director's
=>If ...........................................................
13. Without your help, he wouldn't have been able to get the job
=>If ................................................................
14. he didn't have any breakfast this morning and now he fells so hungry
=>If ............................................................................
15.If you don't tell me the reason. I won't leave
=>Unless ................................................................
16. If I weren't so tired, I would join yiu there
=>Unless ..............................................................
17.I didn't know the anwer, so I couldn't tell you
=>Unless ......................................................
18. If I were you, i would to study harder
=>Were ........................................................
19. Minh isn't here now, so he can't tell you that story
=>If ...........................
20. Carol didn't answer the phone because she was studying
=>If Carol ...........................