can i use perfect present after whenとは 意味・読み方・使い方

When can I use that from?

a person whom one can use freely, whenever necessary

made suitable and available for immediate use

You may use it again, when(ever) necessary.

When can I [can you let me] have my book back?

When should I have this work finished by?

When can you finish this work by?

something that will be available when needed

a person who will be available when needed

When can I have it?

By when do I have to use it?

It is how effectively you use the available time that counts.

capable of being done in a practical and useful way

You may use it whenever you want it―whenever you need it.

When can I receive that?

a thing used for a time instead of the next thing

You may use it whenever you want it.

When can I take that?

When can complete this?

the action of sending out messages repeatedly

When should I use this card?

the act of using one's usual method

what you can repeat immediately after perceiving it

When do I intend to perform it?

something that can be used freely, whenever necessary

Until when can I borrow this?

subordinates at one's beck and call

When can you send me the goods I ordered?

When can you send me those goods?

When can you let me know the result?