Russian ⇄ English

иметь все основания полагать stresses
gen.	has every reason to believe (mascot); have all ground to believe; have all grounds to believe; have reason to believe (Ivan Pisarev); there is reason to believe (Ivan Pisarev); there are reasons to believe (Ivan Pisarev); there is evidence to suggest (Ivan Pisarev); there are indications (Ivan Pisarev); have reason to suppose (Ivan Pisarev); there is reason to suppose (Ivan Pisarev); there are grounds to believe (Ivan Pisarev); have reasons to believe (Ivan Pisarev); there is reason to think (Ivan Pisarev); have grounds to believe have (Ivan Pisarev); reason to think (Ivan Pisarev)
имею все основания полагать
gen.	I seriously believe (that OLGA P.)
имеются все основания полагать
gen.	there is every reason to believe

иметь все основания полагать: 5 phrases in 3 subjects

Economy	1
General	2
Mathematics	2