if they want to get there on time ,they must travel by night as well as by day .同义句if they went to get there on time ,they must travel by day by night.

if they want to get there on time ,they must travel by night as well as by day .同义句if they went to get there on time ,they must travel by day by night.
if they want to get there on time ,they must travel by night as well as by day .同义句
if they went to get there on time ,they must travel by day by night.

if they want to get there on time ,they must travel by night as well as by day .同义句if they went to get there on time ,they must travel by day by night.
not only.but also 不仅.而且