English 9

Revision of all tenses ex-es

1) Put the verbs into the correct tense (simple present or present progressive)
1. Look! Sara is going (go) to the movies.
2. On her right hand, Sara is carrying (carry) her handbag.
3. The handbag is (be) very beautiful.
4. Sara usually puts (put) on black shoes but now she is wearing (wear) white trainers.
5. And look, she is taking (take) an umbrella because it is raining. (rain)

2) Put the verbs into the correct tense (simple past or past perfect)
1. When he woke up (wake up), his mother had already prepared (already/prepare) breakfast.
2. We went (go) to London because our friends had invited (invite) us.
3. He heard (hear) the news, went (go) to the telephone and called (call) a friend.
4. When she started (start) learning English she had already learned (already learn) French.
5. Jane had already typed (already/type) three pages when her computer crashed (crash).
6. By the time the doctor arrived (arrive) at the house the patient had died. (die)
7. Before that day we had never thought (never/think) of traveling to Japan.
8. I had known (know) him a long time before I met (meet) his family.
9. They didn’t know (not/know) where to meet because nobody told (tell) them.
10. It had been (be) cloudy for days before it began (begin) to rain.

3) Put the verbs into the correct tense (simple past or present perfect).
1. I have just finished (just/ finish) my homework.
2. Mary has already written (already/write) five letters.
3. Tom moved (move) to his home town in 1994.
4. My friend was (be) in Canada two years ago.
5. I haven’t been (not/be) to Canada so far.
6. But I had already travelled (already/travel) to London a couple of times.
7. Last week, Mary and Paul went (go) to the cinema.
8. I can’t take any pictures because I haven’t bought (not/buy) a new film yet.
9. Did they spend (they/spend) their holidays in Paris last summer?
10. Have you ever seen (you/ever/see) a whale?

4) Put the verbs into the correct tense (Simple Past or Past Progressive).
1. The receptionist welcomed (welcome) the guests and asked (ask) them to fill in the form
2. The car broke (break) down and we had (have) to walk home.
3. The boys were swimming (swim) while the girls were sunbathing (sunbath).
4. My father came (come) in, looked (look) and told (tell) me to tidy up my room.
5. While one group was preparing (prepare) dinner the others were collecting (collect) wood for the campfire.
6. While the parents were having (have) breakfast the children were running (run) about.
7. Martha turned (turn) off the light and went (go) to bed

Հանրահաշիվ 9

Ռացիոնալ հավասարում

Առաջադրանքներ․
1) Լուծե՛ք ռացիոնալ հավասարումը.

    ա) x=0
    բ) x=2
    գ) x=3, x≠-5
    դ) x=-6, 5, x≠-3
    ե) x=1, x≠-2
    զ) x=1, x≠-2/3

    2) Լուծե՛ք ռացիոնալ հավասարումը.

    ա) D=16+84=100
    x1=-4+10/2=3
    x2=-4-10/2=-7
    x=-7, 3, x≠4
    բ) D=81-80=1
    x1=9+1/2=5
    x2=9-1/2=4
    x=4, x≠5
    գ) D=25-16=9
    x1=-5+3/8=0.25
    x2=-5-3/8=-1
    x=-1, x≠0.25
    դ) D=121-40=81
    x1=-11+9/10=-2/10
    x2=-11-9/10=-2
    x=-2, x≠-2/10
    ե)
    D=64-28=36
    x1=-8+6/2=-1
    x2=-8-6/2=-7
    x=-1, x≠-7
    զ)
    D=9-48=-39
    x1=-3+√39/2=-3.2
    x2=-3-√39/2=-9.2
    x=-9.2, -3.2

    3) Լուծե՛ք ռացիոնալ հավասարումը.

    ա) Լուծում չկա
    բ) Լուծում չկա
    գ) Լուծում չկա

    4) c-ն փոխարինե՛ք այնպիսի թվով, որ հավասարումն ունենա մեկ լուծում․

    ա) c=1, 3
    բ) c=-4, 13
    գ) c=-1
    դ) x=-24, -15