Конечно, давайте разберём каждую комбинацию из четырёх времён и четырёх обстоятельств времени:
Past Simple (Прошедшее простое):
- Bob played tennis just.
- They played tennis just.
- I played tennis just.
- Bob played tennis last week.
- They played tennis last week.
- I played tennis last week.
- Bob played tennis every week.
- They played tennis every week.
- I played tennis every week.
Present Simple (Настоящее простое):
- Bob plays tennis just. (не совсем корректное сочетание; в английском языке "just" используется с Present Perfect)
- They play tennis just. (то же самое, что и выше)
- I play tennis just. (то же самое, что и выше)
- Bob plays tennis now. (тоже не совсем корректное сочетание; для текущего момента используется Present Continuous)
- They play tennis now. (то же самое, что и выше)
- I play tennis now. (то же самое, что и выше)
- Bob plays tennis every week.
- They play tennis every week.
- I play tennis every week.
Present Continuous (Настоящее длительное):
- Bob is playing tennis just now. (более корректное сочетание для текущего момента)
- They are playing tennis just now. (то же самое, что и выше)
- I am playing tennis just now. (то же самое, что и выше)
- Bob is playing tennis now.
- They are playing tennis now.
- I am playing tennis now.
- Bob is playing tennis every week. (не совсем корректное сочетание; для регулярных действий используется Present Simple)
- They are playing tennis every week. (то же самое, что и выше)
- I am playing tennis every week. (то же самое, что и выше)
Present Perfect (Настоящее совершенное):
- Bob has just played tennis.
- They have just played tennis.
- I have just played tennis.
- Bob has played tennis now. (не совсем корректное сочетание; для текущего момента используется Present Continuous)
- They have played tennis now. (то же самое, что и выше)
- I have played tennis now. (то же самое, что и выше)
- Bob has played tennis last week. (более корректное сочетание для прошедших действий - Past Simple)
- They have played tennis last week. (то же самое, что и выше)
- I have played tennis last week. (то же самое, что и выше)
- Bob has played tennis every week. (более корректное сочетание для регулярных действий - Present Simple)
- They have played tennis every week. (то же самое, что и выше)
- I have played tennis every week. (то же самое, что и выше)
Таким образом, корректные предложения будут следующими:
Past Simple (Прошедшее простое):
- Bob played tennis just.
- They played tennis just.
- I played tennis just.
- Bob played tennis last week.
- They played tennis last week.
- I played tennis last week.
- Bob played tennis every week.
- They played tennis every week.
- I played tennis every week.
Present Simple (Настоящее простое):
- Bob plays tennis every week.
- They play tennis every week.
- I play tennis every week.
Present Continuous (Настоящее длительное):
- Bob is playing tennis just now.
- They are playing tennis just now.
- I am playing tennis just now.
- Bob is playing tennis now.
- They are playing tennis now.
- I am playing tennis now.
Present Perfect (Настоящее совершенное):
- Bob has just played tennis.
- They have just played tennis.
- I have just played tennis.
Итак, у нас получилось 18 корректных предложений. Важно помнить, что не все сочетания времен и обстоятельств времени корректны в английском языке, поэтому некоторых предложений просто не существует в правильной форме.