Определите временные формы глагола=сказуемого. Переведите предложения.1) They are a friendly family. 2) Spring has come. 3) For many centuries economists have been dividing economic theory into macroeconomics and microeconomics...

1) They are a friendly family. Они  - дружная семья. (Present Simple,глагола to be) 2) Spring has come.  – Весна пришла. (Present Perfect) 3) For many centuries economists have been dividing economic theory into macroeconomics and microeconomics. Многие столетия экономисты делили экономическую теорию на макроэкономику и микроэкономику. (present perfect continuous) 4) The price for small computers had fallen. – Цена на маленькие компьютеры упала. (Past Perfect)