2. Choose the correct options to complete the rules.
(Chọn các tùy chọn đúng để hoàn thành các quy tắc)
1. We use the first conditional to talk about a possible event and its result in the future / past.
2. We introduce the situation with if or unless + present / past simple.
3. We describe the result with will and won’t / do and doesn’t + infinitive without to.
4. We use unless to say if... not / if ... when.
5. When the if clause is first / second, we use a comma. When the if clause comes first / second, we don't need a comma.
If the Earth gets too crowded, we'll move to other planete.
We'll move to other planets if the Earth gets too crowded.
Bài Làm:
1. We use the first conditional to talk about a possible event and its result in the future.
2. We introduce the situation with if or unless + present simple.
3. We describe the result with will and won’t + infinitive without to.
4. We use unless to say if... not.
5. When the if clause is first, we use a comma. When the if clause comes second, we don't need a comma.