The simple past (e.g., did. . .take) expresses two things: 1) a specific time, and 2) the event. The time it took place doesn't have to be stated. It can be implied, and it usually is. For example,
A. Did you take your lunch (this morning)?
The present perfect (e.g., have. . .taken) expresses two things: 1) a non-specific time, that is, when it happened is either a) unknown o
The above sentence uses what is called "causative form". We use the causative form to indicate that we are not doing something ourselves, but have arranged someone else to do it for us.
The structure is:
subject + have + object + past participle
Note that "have" must be in the correct verb tense according to the se
"Also, be aware that moving toward and/or standing near an "offender" will be taken as a disciplinary action, so always move toward the trouble spot. If you are having class discussion, involve the noisy students in the discussion to keep them focused on the business of the classroom. "
1. If you are in the act of having class discussion; during the time that class discussion is happening. 2. On the occasion when you have class discussion (if you do); if class discussion is something that you do; if you decide to have class discussion on some particular occasion
I am afraid the examples are somewhat unnatural but I believe they are grammatically valid: 1. Do you like the party? – It’s great! We are having fun here! Join us! 2. What were they doing yesterday at 6 p.m.? – They were out. They were having their hairs cut. 3. Switch it off, will you? I have had enough of it today. 4. Sorry I’m late. What have you been doing? Are you angry