プレゼントパーフェクト・シンプルは、過去から現在までの経験や、過去に起きたが具体的な時間は言及されていない出来事、または過去に始まって現在まで続いている状態や行為を表すのに用いられる英語の時制です。これは「have/has + 過去分詞」という形をとります。例えば、「I have eaten sushi.」では、「私は過去に寿司を食べた（経験がある）」さらに、現在完了は繰り返された活動や何度も起きた出来事を示す場合にも用いられます。
この演習では、英語学習者が現在完了形を使って文章を完成させる練習をします。各文には空欄があり、正しい動詞の形を埋めて文を完成させることが必要です。提示されたキュー（ヒントの単語）をもとに、適切な形を考えてみましょう。これは、文法理解を深め、実際のコミュニケーションで自然な英語を使えるようになるための良い練習になります。
演習1：現在完了形の基本的な使い方
I *have never* (never) seen a polar bear in the wild.
She *has just* (just) finished her homework.
We *have lived* (live) in this city for ten years.
He *hasn’t visited* (not visit) Europe yet.
They *have gone* (go) to the supermarket, so we’ll have to wait.
Have you *ever* (ever) ridden a camel?
My friend *has lost* (lose) his keys and can’t get into his house.
It *has rained* (rain) a lot this week.
She *hasn’t seen* (not see) her cousin since last year.
How long have you *known* (know) each other?
The teacher *has already* (already) explained the grammar rules.
I *have not decided* (not decide) where to go on vacation yet.
They *have* (have) three tests so far this semester.
Have they *finished* (finish) the project already?
She *has been* (be) to Paris three times.
演習2：経験を述べる現在完了形の使用
I *have travelled* (travel) to many countries over the years.
She *has met* (meet) several celebrities at events.
We *haven’t decided* (not decide) on a name for our baby yet.
He *has written* (write) five novels and is working on a sixth.
They *have never* (never) seen snow before, as they live in a tropical country.
Have you *ever* (ever) had the opportunity to speak in front of a large audience?
My brother *has broken* (break) his arm twice in his life.
It *has been* (be) years since I last went to the theater.
She *hasn’t eaten* (not eat) sushi before, so let’s take her to a Japanese restaurant.
For how long have you *had* (have) your pet dog?
The scientist *has made* (make) several important discoveries.
I *haven’t read* (not read) that book yet, but I plan to.
They *have had* (have) some difficulties adjusting to the new environment.
Have they *received* (receive) the results of the test?
He *has been* (be) interested in history since he was a child.
