Formula : verb to have (have/ has) + past participle (4th column of the verb list)
I / You / We / They have
He / She / It has
Ex: have/ has eaten
have/ has done
Usage : -An action which has happened/ completed 已经完整发生的一件事、已经完成的一个动作、刚刚发生。
Examples : a) -I have eaten pizza. 我已经吃了批萨。（我吃饱、抹好嘴巴后就说这句话）
b) -Nathalie has baked a cheese cake.
c) -The pupils have already done their homework.
Keywords : -already
Complete with the present perfect:
1.(to buy) =» I ________________ a bicycle.
2. (to pass) =» I am glad that you ___________________ your exam.
3. (to work) =» Phil _______________ all day.
4. (already + to see) =» I ___________________ this film.
5. (to break out) =» Fire ___________________ in my neighbour's kitchen.