Completar frases Упражнение 6Versión en línea Образуйте утвердительную форму Present Perfect Continuous для предложенных отрицательных предложений. por Olga Vasilene 1 surfing have have has doing has been have been been been developing reviewing been been have revising looking We haven't been looking for a flat for three months . ? We for a flat for three months . Jane hasn't been surfing the Web all morning . ? Jane the Web all morning . We have not been doing a lot of trips round the country . - We a lot of trips round the country . The children have not been revising for their exams since last week . - The children for their exams since last week . Our engineers have not been developing the prototype for 2 years . - Our engineers the prototype for 2 years . My boss hasn't been reviewing our salaries . - My boss our salaries .
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