NCERT Solutions for Class 4th English Chapter 11 B. Join the sentences using the correct conjunction. — Let us Write
Book page 121–122 Updated on2026-09-19
Q1.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 1. She was hungry. She ate a sandwich. (or/but/because)
Answer
She ate a sandwich because she was hungry.
Being hungry is the reason why she ate. Because is the word that gives a reason, so it is the right choice.
Why the order changes:Because must sit just before the reason. The reason here is “she was hungry”, so that part moves to the end. Writing “She was hungry because she ate a sandwich” would say the opposite, and that makes no sense.
Tip: After you join two sentences, read your new sentence aloud. If it sounds odd, try swapping the two halves.
Q2.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 2. I wanted to go out. It was too late. (or/and/but)
Answer
I wanted to go out, but it was too late.
The two halves pull against each other. I wanted to go out — and yet I could not. But is the word that shows this difference.
Why not and:And simply adds one idea to another, as in “I wanted to go out and I went”. Here the second idea blocks the first, so we need but.
Punctuation tip: When but joins two full sentences, put a comma just before it.
Q3.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 3. He was happy. He got a new toy. (or/and/because)
Answer
He was happy because he got a new toy.
Getting the new toy is the reason for his happiness. Because gives a reason.
How to test it: Ask “Why was he happy?” The answer is the second sentence. Whenever the second sentence answers why, use because.
Q4.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 4. We can go to the zoo. We can go to the aquarium. (or/but/because)
Answer
We can go to the zoo or the aquarium.
You may also write it in full: We can go to the zoo, or we can go to the aquarium.
The sentence offers two places, and you will pick only one of them. Or is the word that gives a choice.
Why not and:And would mean going to both places. Or means going to one of the two. The word you choose changes the meaning, so choose carefully.
Q5.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 5. Aman has a pen. Aman has a pencil. Aman has an eraser. (or/because/and)
Answer
Aman has a pen, a pencil and an eraser.
Here there are three sentences, not two. All three add information about what Aman has, so we join them with and.
The rule for a list of three: Put a comma after the first item, and use and only before the last one. We do not write “a pen and a pencil and an eraser” — that sounds clumsy.
Notice: The name Aman is written only once. When the same person does everything, we do not repeat the name in every part.
Q6.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 6. Simran loves to eat mangoes. She loves bananas. (or/and/but)
Answer
Simran loves to eat mangoes and bananas.
She loves both fruits. The second sentence simply adds one more fruit to the first, and and is the word that adds information.
Why not but:But would show a difference, as in “Simran loves mangoes but not bananas”. There is no difference here — she likes both.
Q7.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 7. He ran fast. He missed the bus. (and/but/because)
Answer
He ran fast, but he missed the bus.
Running fast should have helped him catch the bus. It did not. The second half surprises us after the first, so we need but.
The test for but: Ask yourself, “Is the second part a surprise after the first?” If yes, the answer is but.
Q8.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 8. She stayed home. She was not feeling well. (or/and/because)
Answer
She stayed home because she was not feeling well.
Not feeling well is the reason why she stayed home. Because gives a reason.
Tip: Notice how the two halves already sit in the right order here. Nothing has to move — just drop because between them.
Q9.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 9. I love chocolate. I love vanilla. (and/but/or)
Answer
I love chocolate and vanilla.
Both flavours are loved, so the second idea is added to the first. And adds information.
Why not or:Or would mean I love only one of the two and you must choose which. But the sentences say I love both.
Try this: Change the sentence to “Would you like chocolate or vanilla?” Now or is right, because you are being offered a choice.
Q10.
B. Join the sentences using the correct conjunction. Remember (page 121):and adds information · or gives a choice · but shows contrast (difference) · because gives a reason. 10. The baby is crying. He is hungry. (but/or/because)
Answer
The baby is crying because he is hungry.
Hunger is the reason for the crying, and because gives a reason.
Sentences to join
Conjunction
The joined sentence
1. She was hungry. She ate a sandwich.
because
She ate a sandwich because she was hungry.
2. I wanted to go out. It was too late.
but
I wanted to go out, but it was too late.
3. He was happy. He got a new toy.
because
He was happy because he got a new toy.
4. We can go to the zoo. We can go to the aquarium.
or
We can go to the zoo or the aquarium.
5. Aman has a pen. … a pencil. … an eraser.
and
Aman has a pen, a pencil and an eraser.
6. Simran loves mangoes. She loves bananas.
and
Simran loves to eat mangoes and bananas.
7. He ran fast. He missed the bus.
but
He ran fast, but he missed the bus.
8. She stayed home. She was not feeling well.
because
She stayed home because she was not feeling well.
9. I love chocolate. I love vanilla.
and
I love chocolate and vanilla.
10. The baby is crying. He is hungry.
because
The baby is crying because he is hungry.
The four joining words in one line:and adds · or chooses · but contrasts · because explains. Say this to yourself before you fill any blank.
Note — a small printing slip: In the example box on page 121 the book writes “I was tired, but I finished my Homework.” The word homework does not need a capital H in the middle of a sentence. Write it as homework.