my old pen and my pen
The negative form of "she had a nice pen" is "She did not have a nice pen" or "She hadn't a nice pen."
Has is the present tense of possessing something. Had is the past tense of having at some point possessed something. He has a pen on his desk. He had a pen on his desk earlier.
I am putting the pen on the table.
yes but its past tense. also you could say he drew out a pen from his pocket
It depends on the tense. If it is future tense of it is something that is going to or should happen, then it would be A. If it was present tense (self-explanatory) then it would be B. If it was past tense or something that already happened, then it would be C or D.
Ummm... t e a c h e r guess. Or with a pen/pencil.
"Have you found" is the correct phrasing. It is used to inquire about a person's current status regarding the discovery of something. "Had you found" is past perfect tense and is used to ask about a completed action in the past.
He didn't have a pen.
"To mark" is a regular verb, which means it has a regular past tense (add an -ed). "The little boy marked the wall with a black pen." As for participles, they are also regular: For the present, you add -ing. "I am marking page 2 of this proposal; please look it over." And for the past, you use the helping verb "have" (or "has" for a 3rd person singular subject)-- "I have marked page 2, so please read my corrections carefully." "Maria has marked page 2, and she hopes you will look at it."
You certainly can use a helping verb, but it depends on the tense. If it's a simple past tense, you don't need one: Who ate my sandwich? Who took my pen? But if you are using a past perfect tense, the helping verb is necessary, to show an action that happened earlier in the past: Who has seen this movie? Who has read the chapter? Other examples of interrogative sentences with who asking the question but no helping verb: Who is Alice? Who are you? Who was the one? Who has the answer?
The homophone of "led" is "lead." "Led" is the past tense of the verb "lead," while "lead" is a chemical element with the symbol Pb.
The POLAR Pen was Invented this past year 2013 by Andrew Gardner from INDIEDESIGN.