Make up the sentences using the correct grammar tense. 1) he/send/the invitation/two days ago. 2) she/ decorate/the roo/for two hours now. 3) they/just/build/a new shopping centre. 4) we/perform/the show/in a week. 5) this team/always/represent/our school/at the competitions. 6) they/demonstrate/the work/of a new gadget/at the moment.