1. Did Vs Has
You know that “did” is past tense and “has” is present perfect. What is their difference?
|Did||Started and Completed||at a particular time.|
|Has / have||Started but not completed||at no particular time.|
Use simple past if the action is completed.
- She was admitted yesterday (when?)
- He demanded more food in the morning (when?)
Use present perfect if the action is not completed.
- She has been advised (But she has not followed the advice)
2. Is, Has, Has had + Disease condition:
Study the correct usage:
|Is / was / has been||She is hypertensive.|
|Has||She has hypertension.|
|Has had||She has had hypertension.|
3. H + No Time
H words are have, has and had. They are used when the time of the action is not mentioned.
- Has goes after singular subjects like he, she, Ms Millie, Mr Jones, etc.
- If the event has a time, like, Ms Millie met with an accident on Monday, do not use has, have or had.
- Do not say, “Ms Millie has met with an accident on Monday.”
4. Ving + Happening Now
Use Ving forms (ing forms) of the verbs if the action is / was happening. Suppose you are on a call with your friend when your mother calls you from the kitchen. What would you tell your mother?
- Mom, give me a minute; I am speaking to my friend.
- Mom, give me a minute; I speak to my friend.
In this case, you have to say, “Mom, give me a minute; I am speaking to my friend,” because you “are talking” as your mother calls you out from the kitchen.
5. Did + Had
Did and had are used in combination. That means, if there are two past actioned mentioned in a sentence, the one that happened first gets “had”.
- Dr Saleel arrived the theatre at 2 pm.
- Mr Dan died at 1.55.
When Dr Saleel arrived at the theatre, Mr Dan had died.
- She has been ________ since 2010.
- The baby was found mildly ______.
- She ______ pancreatitis for the last three years.
- When the injection was brought, the patient _________.
- Please do not enter the room. The Doctor ______ to the patient.