Relative clauses

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Permission

We can use verbs such as 'can', 'could' and 'may' to ask for and give permission. We also use modal verbs to say something is not allowed.

For example:

• 
  Could I leave early today, please?
  
• 
  You may not use the car tonight.
  
• 
  Can we swim in the lake?
  

Habits

We can use 'will' and 'would' to talk about habits or things we usually do, or did in the past.

For example:

• 
  When I lived in Italy, we would often eat in the restaurant next to my flat.
  
• 
  John will always be late!
  

3.Adverbs of Frequency Rules

These simple rules for adverbs of frequency will help you to use them correctly:

• 
  Always use adverbs of frequency to discuss how often something happens.
  
• 
  Adverbs of frequency are often used to indicate routine or repeated activities, so they are often used with the present simple tense.
  
• 
  If a sentence has only one verb, place the adverb of frequency in the middle of the sentence so that it is positioned after the subject but before the verb. For example: Tom never flies. He always takes the bus.
  
• 
  When a sentence contains more than one verb, place the adverb of frequency before the main verb. For example: They have often visited Europe.
  
• 
  When using an adverb of frequency in the negative or in forming a question, place it before the main verb. For example: Do you usually get up so late?
  

Examples of Adverbs of Frequency

Each sentence contains an example of an adverb of frequency; the examples are italicized for easy identification.

1. 
   The incubator turns each egg hourly.
   
2. 
   We take a vacation at least once annually.
   
3. 
   I usually shop for groceries on Saturday mornings.
   
4. 
   He is often late for work.
   
5. 
   We seldom see John.
   
6. 
   My dentist told me I should floss twice daily.