1. Irarely walks in the moutains.

→ Irarely doesn't walk in the moutains.

2. My father reads books every night.

→ My father doesn't read books every night.

3. My sister sometimes rides her the bike in morning.

→ My sister doesn't sometimes ride her the bike in morning.

4. Nam often goes swimming in summer.

→ Nam doesn't often go swimming in summer.

5. I play chess with my brother everyday.

→ I don't play chess with my brother everyday.

6. I play volleyball twice a week.

→ I don't play volleyball twice a week.

Câu 1: Nếu I rarely walk in the moutains ( thêm dấu cách )

→ I don't rarely walk in the moutains.

Dạng phủ định: $S+don't/doesn't+V_{nguyên thể}.$

Dùng $don't$ với ngôi số nhiều $(I,we,you,they,danh từ số nhiều).$

Dùng $doesn't$ với ngôi số ít $(he,she,it,danh từ số ít).$

Bạn tham khảo :

1 Irarely don't  walk in the moutains

3 My father doesn't  read book every night

5 My sister doesn't  sometimes ride her the bike in mornimg

6 Nam doesn't often go swimming in summer

7 I don't play chess with my brother everyday

8 I don't play volleyball twice a week

Phần giải thích

Form thì HTĐ đối với V thường

S + V ( s ; es )

S + don't / doesn't + V ( nguyên thể )

Do / Does + S + V 

Mà đề bài chia sang phủ định nên ta dùng phần in đậm để làm ^^     .