We could not have a picnic last Sunday,because it was rainy同义句转换
=It was rainy last Sunday.It (was)(_hardly)for us (_to)(_have)a picnic
=It was rainy last Sunday so we couldn't have a picnic.
We could not have a picnic last Sunday,because it was rainy同义句转换
=It was rainy last Sunday.It (was)(_hardly)for us (_to)(_have)a picnic
=It was rainy last Sunday so we couldn't have a picnic.