When expressing uncertainty or offering a tentative observation, the phrase "looks to be" can be replaced with a variety of synonyms. For example, instead of saying "It looks to be raining outside," you could say "It appears to be raining," "It seems as though it's raining," or "There may be some precipitation occurring." Other alternatives include "It gives the impression of," "It suggests," or simply "It may be." Using synonyms can add nuance and variety to your language, and help you communicate with greater precision and clarity. Experiment with different alternatives to "looks to be" to find the perfect fit for your intended meaning.