Using 'If' and 'Whether' Correctly

This video lesson by Alicia from EnglishClass101.com explains the differences between using 'if' and 'whether' in English sentences. 'If' is used for conditional statements, while 'whether' is used when there are two options. The lesson provides examples and hints for using these words correctly, including the use of 'whether' after prepositions and before infinitives. It also highlights situations where both words can be used but with different meanings, emphasizing the importance of clarity in communication.

What is the main focus of this lesson?

• How to speak English fluently

• Advanced grammar rules

• Differences between 'if' and 'whether'

• Common English idioms

When do we typically use 'if' in a sentence?

• To ask questions

• To list options

• In conditional statements

• To express certainty

Which of the following is an example of a conditional sentence using 'if'?

• She asked whether she could leave early.

• I wonder whether it will rain.

• If you need anything, let me know.

• He decided to go for a walk.

What is a key difference between 'if' and 'whether'?

• 'If' is used in past tense, 'whether' in future tense

• 'If' is used for questions, 'whether' for statements

• 'If' is used for conditions, 'whether' for options

• 'If' is more formal than 'whether'

In which situation would you use 'whether' instead of 'if'?

• When stating a fact

• When expressing a condition

• When there are two possible outcomes

• When asking for permission

Which sentence correctly uses 'whether'?

• Is it okay if I sit here?

• I can't decide whether to go or stay.

• Let me know if you need anything.

• What should we do if there's a problem?

What is a guideline for using 'whether'?

• Use it only in questions

• Use it after prepositions and before infinitives

• Use it to express certainty

• Use it in past tense sentences

Which sentence demonstrates the correct use of 'whether' after a preposition?

• They talked about if hiring new staff.

• They talked about hiring new staff.

• They talked about whether to hire new staff.

• They talked about if to hire new staff.

What happens when both 'if' and 'whether' are grammatically correct in a sentence?

• The sentence becomes incorrect

• The meaning of the sentence changes

• The sentence becomes more formal

• The sentence becomes a question

Which sentence shows a change in meaning when using 'if' versus 'whether'?

• Please call me as soon as you're going to the meeting.

• Please call me whether or not you're going to the meeting.

• Please call me when you're going to the meeting.

• Please call me if you're going to the meeting.