The Sentences already in simple present.
Rewrite the sentences in -
present continuous tense,
present perfect tense,
present perfect continuous tense.
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1.The cat kills the mouse.
2.she studies well.
3.she visit chennai often.
4.I live in goa.
pls help me
Answers
1) The cat is killing the mouse.
The mouse has been killed by the cat
The cat is being killing the mouse.
2) She is studying well.
She has been studied well.
She is being studying well.
3) She is visiting Chennai often.
She has been visited Chennai often.
She is being visiting Chennai often.
4) I'm living in Goa.
I've been lived in Goa.
I'm being living in Goa.
Answer:1.The cat is killing the mouse(present continuous tense)
The cat has killed the mouse. (present perfect tense)
The cat has been killing the mouse. (present perfect continuous tense.
2. She is studying well. (present continuous tense)
She has studied well. (present perfect tense)
She has been studying well. (present perfect continuous tense)
3. She is visiting Goa often. (present continuous tense)
She has visited Goa often. (present perfect tense)
She has been visiting Goa often. (present perfect continuous tense)
4. I am living in Goa. (present continuous tense)
I have lived in Goa. (present perfect tense)
I have been living in Goa. (present perfect continuous tense)
Explanation: Just practice more and you will get the hang of it. It is really easy if you practice.