tolonng bgt y gan lg perlu nie

21. heard, see, watch, notice, look at.
22. + he will have studied english
    - he wont have studied english
    ? will he have studied english?
25. 1. avc of condition
      2.avc of manner
     3. avc of time
    4. avc of reason
    5. avc of result 
     6. avc of that
     7.    of purpose
    8.       of contrast
     9.      of place
     10.    of comparison