For actions or events expected to take place in the future, the construction with "will" can be used: "The president will arrive tomorrow." Future events are also often expressed using the "be going to" construction: "She is going to arrive tomorrow." Planned events can also be referred to using the present progressive ("She is arriving tomorrow") or, if precisely scheduled, the simple present ("She arrives tomorrow"). The future progressive and future perfect can be used analogously to the past equivalents: "We will be sitting on the beach this afternoon"; "We will have left the house by 4 o'clock". However, in subordinate clauses expressing a condition or a time reference, present forms are used rather than the forms with "will": "If/When you get" (not "will get") "there..."