Grammar exercise 6 grades

1. I use the Present Perfect when      the result of an action in the past is important in the present.  the action is happening at the moment of speaking.  the action finished in the past.   
2. Typical signal words for the Present Perfect are      already, just, so far, yet.  always, every day, often, sometimes.  at the moment, Listen!, Look!, now.   
3. I use      do/does + infinitive of the verb  had + past participle  have/has + past participle    of the verb to form the Present Perfect.
4. I use      did + not + infinitive of the verb  do + not + infinitive of the verb  have/has + not + past participle    to form the negative.
5. I use      did + not + infinitive of the verb  has + not + past participle  have + not + past participle    to form the negative in the 3rd person singular (he, she, it).
6. I can use the contracted form  for have + not and  for has + not .
7. I add  to the infinitive of regular verbs when I use the past participle.
8. With irregular verbs I use the form in the      1st column of the table of the irregular verbs.  2nd column of the table of the irregular verbs.  3rd column of the table of the irregular verbs.